chore(deps): bump actions/checkout from 5 to 6 (#2550)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/CI_check_integration_format.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Ensure no hyphens
         run: |

.github/workflows/CI_docstring_labeler.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout base commit
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.base_ref }}
 
@@ -33,7 +33,7 @@ jobs:
           echo "checksum=$CHECKSUM" >> "$GITHUB_OUTPUT"
 
       - name: Checkout HEAD commit
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           # This must be set to correctly checkout a fork

.github/workflows/CI_docusaurus_sync.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout this repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -68,7 +68,7 @@ jobs:
 
     steps:
       - name: Checkout Haystack repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: deepset-ai/haystack
           ref: main

.github/workflows/CI_license_compliance.yml

@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python
         uses: actions/setup-python@v6

.github/workflows/CI_pypi_release.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           token: ${{ secrets.HAYSTACK_BOT_TOKEN }}
           fetch-depth: 0

.github/workflows/CI_readme_sync.yml

@@ -43,7 +43,7 @@ jobs:
         hs-docs-version: ${{ fromJSON(needs.get-versions.outputs.versions) }}
     steps:
       - name: Checkout this repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v6

.github/workflows/aimlapi.yml

@@ -40,7 +40,7 @@ jobs:
         working-directory: .
         run: git config --system core.longpaths true
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6

.github/workflows/amazon_bedrock.yml

@@ -49,7 +49,7 @@ jobs:
         working-directory: .
         run: git config --system core.longpaths true
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6

.github/workflows/amazon_sagemaker.yml

@@ -39,7 +39,7 @@ jobs:
         working-directory: .
         run: git config --system core.longpaths true
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6

.github/workflows/anthropic.yml

@@ -40,7 +40,7 @@ jobs:
         working-directory: .
         run: git config --system core.longpaths true
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6