Bump actions/checkout from 3 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...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>

Author: dependabot[bot]

.github/workflows/a_test_target_tests.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         submodules: 'recursive'
         token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/agents_validate.yaml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         submodules: 'recursive'
         token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/auto-delete-branch.yml

@@ -17,7 +17,7 @@ jobs:
     name: Delete Merged Branches
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch all branches and history
 

.github/workflows/cursor_fix_ci_failures.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/docs-lint.yaml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
 

.github/workflows/linter_require_ruff.yaml

@@ -14,7 +14,7 @@ jobs:
     if: github.event_name == 'pull_request' || github.event.pull_request == null
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Read Python version
         run: echo "PYTHON_VERSION=$(cat .python-version | tr -d '\n')" >> $GITHUB_ENV
       - uses: actions/setup-python@v5

.github/workflows/nightly_tests.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         submodules: 'recursive'
         token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/vulture_dead_code.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         submodules: 'recursive'
         token: ${{ secrets.GITHUB_TOKEN }}