chore(deps): update actions/checkout action to v6 (#265)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v4` -> `v6` |

---

### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

###
[`v6`](https://redirect.github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v602)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v5...v6)

- Fix tag handling: preserve annotations and explicit fetch-tags by
[@&#8203;ericsciple](https://redirect.github.com/ericsciple) in
[#&#8203;2356](https://redirect.github.com/actions/checkout/pull/2356)

###
[`v5`](https://redirect.github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v501)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v4...v5)

- Port v6 cleanup to v5 by
[@&#8203;ericsciple](https://redirect.github.com/ericsciple) in
[#&#8203;2301](https://redirect.github.com/actions/checkout/pull/2301)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am" in timezone UTC,
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4xNzMuMSIsInVwZGF0ZWRJblZlciI6IjQxLjE3My4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJnaXRodWItYWN0aW9ucyIsIm1ham9yLXVwZGF0ZSJdfQ==-->

Co-authored-by: Renovate Bot <renovate@whitesourcesoftware.com>

Author: a-klos

.github/workflows/build-images.yml

@@ -16,7 +16,7 @@ jobs:
       tag: ${{ steps.release_tag.outputs.tag }}
       version: ${{ steps.release_tag.outputs.version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Resolve release tag & version
@@ -57,7 +57,7 @@ jobs:
       VERSION: ${{ needs.prepare.outputs.version }}
       TAG: ${{ needs.prepare.outputs.tag }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Checkout release tag

.github/workflows/bump-chart-version.yml

@@ -19,7 +19,7 @@ jobs:
   bump:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           ref: ${{ inputs.ref || 'main' }}

.github/workflows/create-release.yml

@@ -16,7 +16,7 @@ jobs:
       }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           token: ${{ secrets.PR_AUTOMATION_TOKEN }}

.github/workflows/lint-and-test.yml

@@ -22,7 +22,7 @@ jobs:
       infrastructure: ${{ steps.filter.outputs.infrastructure || steps.manual.outputs.infrastructure }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -87,7 +87,7 @@ jobs:
         service: ["admin-backend", "document-extractor", "rag-backend", "mcp-server"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set Docker Image Name
         run: |
@@ -117,7 +117,7 @@ jobs:
         library: ["rag-core-lib", "rag-core-api", "admin-api-lib", "extractor-api-lib"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set Docker Image Name
         run: |
@@ -148,7 +148,7 @@ jobs:
     if: needs.changes.outputs.frontend == 'true' || github.event_name == 'workflow_dispatch'
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -192,7 +192,7 @@ jobs:
     if: needs.changes.outputs.infrastructure == 'true' || github.event_name == 'workflow_dispatch'
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v3

.github/workflows/prepare-release.yml

@@ -37,7 +37,7 @@ jobs:
         if: ${{ github.event_name == 'workflow_dispatch' }}
         run: echo "releasable=true" >> "$GITHUB_OUTPUT"
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         if: ${{ github.event_name == 'pull_request' }}
         with:
           fetch-depth: 0
@@ -57,7 +57,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [changes]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/promote-clean-semver.yml

@@ -30,7 +30,7 @@ jobs:
     name: Publish clean semver, refresh locks, bump appVersion
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           ref: ${{ inputs.ref || 'main' }}

.github/workflows/publish-chart-packages.yml

@@ -28,7 +28,7 @@ jobs:
       allow: ${{ steps.allow_manual.outputs.allow || steps.allow_push.outputs.allow }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Allow manual run
         id: allow_manual
         if: ${{ github.event_name == 'workflow_dispatch' }}
@@ -47,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ needs.gate.outputs.allow == 'true' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           ref: ${{ inputs.ref || 'main' }}

.github/workflows/publish-pre-and-qa.yml

@@ -29,7 +29,7 @@ jobs:
       version: ${{ steps.ver.outputs.version }}
       clean_version: ${{ steps.ver.outputs.clean_version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -150,7 +150,7 @@ jobs:
     env:
       PRE_RELEASE_VERSION: ${{ needs.publish-pre.outputs.version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -201,7 +201,7 @@ jobs:
     env:
       PRE_RELEASE_VERSION: ${{ needs.publish-pre.outputs.version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/renovate.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Self-hosted Renovate
         uses: renovatebot/github-action@v43.0.20
         with: