chore(deps): update actions/checkout action to v5 (#99)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v4` -> `v5` |

---

### Release Notes

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

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

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

</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:eyJjcmVhdGVkSW5WZXIiOiI0MS4xMjEuNCIsInVwZGF0ZWRJblZlciI6IjQxLjEyMS40IiwidGFyZ2V0QnJhbmNoIjoiZGVwcy1tYWluIiwibGFiZWxzIjpbImdpdGh1Yi1hY3Rpb25zIiwibWFqb3ItdXBkYXRlIl19-->

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

Author: a-klos

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

@@ -21,7 +21,7 @@ jobs:
       infrastructure: ${{ steps.changes.outputs.infrastructure }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
@@ -72,7 +72,7 @@ jobs:
         service: ["admin-backend", "document-extractor", "rag-backend", "mcp-server"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set Docker Image Name
         run: |
@@ -102,7 +102,7 @@ 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@v5
 
       - name: Set Docker Image Names
         run: |
@@ -133,7 +133,7 @@ jobs:
     if: needs.changes.outputs.frontend == 'true' || github.event_name == 'workflow_dispatch'
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -177,7 +177,7 @@ jobs:
     if: needs.changes.outputs.infrastructure == 'true' || github.event_name == 'workflow_dispatch'
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v3

.github/workflows/renovate.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Self-hosted Renovate
         uses: renovatebot/github-action@v43.0.5
         with:

.github/workflows/semantic-release.yml

@@ -23,7 +23,7 @@ jobs:
       new-release-version: ${{ steps.semantic-release.outputs.new-release-version }}
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           submodules: false
@@ -118,7 +118,7 @@ jobs:
           echo "🔍 Debug: needs.semantic-release.outputs.new-release-version = ${{ needs.semantic-release.outputs.new-release-version }}"
 
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           submodules: false

infrastructure/.github/workflows/semantic-release.yml

@@ -13,7 +13,7 @@ jobs:
       contents: write # to be able to publish a GitHub release
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Setup Node.js

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

@@ -33,7 +33,7 @@ jobs:
     needs: [SanitizeBranchName]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           repository: stackitcloud/rag-core-library
@@ -59,7 +59,7 @@ jobs:
             service: [ "rag-core-lib", "rag-core-api", "admin-api-lib", "extractor-api-lib" ]
     steps:
         - name: Checkout code
-          uses: actions/checkout@v4
+          uses: actions/checkout@v5
           with:
               token: ${{ secrets.GITHUB_TOKEN }}
               repository: stackitcloud/rag-core-library

libs/.github/workflows/semantic-release.yml

@@ -13,7 +13,7 @@ jobs:
       contents: write # to be able to publish a GitHub release
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Setup Node.js