Bump actions/checkout from 4 to 6 (#2490)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/aws-integration.yaml

@@ -52,7 +52,7 @@ jobs:
         with:
           go-version: "1.25"
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Cache go module
         uses: actions/cache@v4
         with:

.github/workflows/ci.yaml

@@ -27,7 +27,7 @@ jobs:
     name: "Run pre-commit hooks"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: '3.12'
@@ -83,7 +83,7 @@ jobs:
         with:
           go-version: "1.25"
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Cache go module
         uses: actions/cache@v4
         with:

.github/workflows/emailsender-central-compatibility.yaml

@@ -51,7 +51,7 @@ jobs:
           username: ${{ secrets.QUAY_RHACS_ENG_RO_USERNAME }}
           password: ${{ secrets.QUAY_RHACS_ENG_RO_PASSWORD }}
       - name: Checkout this repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: acs-fleet-manager
           fetch-depth: 0

.github/workflows/multicluster-e2e.yaml

@@ -83,7 +83,7 @@ jobs:
       - name: Install oc
         uses: redhat-actions/oc-installer@v1
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set cluster credentials
         run: |
           set -eo pipefail

.github/workflows/openapi_update.yaml

@@ -19,7 +19,7 @@ jobs:
           - "redhat-developer/app-services-sdk-java"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dorny/paths-filter@v3
         id: filter
         with: