Bump actions/checkout from 4 to 6

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>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -49,7 +49,7 @@ jobs:
     needs: check_source
     if: needs.check_source.outputs.run_tests == 'true'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-python@v5
@@ -103,7 +103,7 @@ jobs:
         run: |
           apt update && apt install git -yq
           git config --global --add safe.directory "$GITHUB_WORKSPACE"
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 1
           persist-credentials: false
@@ -142,7 +142,7 @@ jobs:
     needs: check_source
     if: needs.check_source.outputs.run_tests == 'true'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-python@v5
@@ -308,7 +308,7 @@ jobs:
       OPENSSL_DIR: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}
       LD_LIBRARY_PATH: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}/lib
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - name: Runner image version
@@ -370,7 +370,7 @@ jobs:
       OPENSSL_VER: 3.0.15
       PYTHONSTRICTEXTENSIONBUILD: 1
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - name: Register gcc problem matcher
@@ -489,7 +489,7 @@ jobs:
       PYTHONSTRICTEXTENSIONBUILD: 1
       ASAN_OPTIONS: detect_leaks=0:allocator_may_return_null=1:handle_segv=0
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - name: Runner image version

.github/workflows/jit.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 90
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Build tier two interpreter
@@ -107,7 +107,7 @@ jobs:
     env:
       CC: ${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-python@v5
@@ -173,7 +173,7 @@ jobs:
     needs: interpreter
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-python@v5

.github/workflows/lint.yml

@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-python@v5

.github/workflows/mypy.yml

@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-python@v5

.github/workflows/reusable-change-detection.yml

@@ -60,7 +60,7 @@ jobs:
     steps:
     - run: >-
         echo '${{ github.event_name }}'
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - name: Check for source changes

.github/workflows/reusable-docs.yml

@@ -27,7 +27,7 @@ jobs:
       refspec_pr: '+${{ github.event.pull_request.head.sha }}:remotes/origin/${{ github.event.pull_request.head.ref }}'
     steps:
     - name: 'Check out latest PR branch commit'
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         persist-credentials: false
         ref: >-
@@ -82,7 +82,7 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 60
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - uses: actions/cache@v4

.github/workflows/reusable-macos.yml

@@ -31,7 +31,7 @@ jobs:
       TERM: linux
     runs-on: ${{ inputs.os }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - name: Runner image version

.github/workflows/reusable-tsan.yml

@@ -30,7 +30,7 @@ jobs:
       OPTIONS: ${{ inputs.options }}
       SUPPRESSIONS_PATH: ${{ inputs.suppressions_path }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - name: Runner image version

.github/workflows/reusable-ubuntu.yml

@@ -29,7 +29,7 @@ jobs:
       PYTHONSTRICTEXTENSIONBUILD: 1
       TERM: linux
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     - name: Register gcc problem matcher

.github/workflows/reusable-wasi.yml

@@ -22,7 +22,7 @@ jobs:
       CROSS_BUILD_PYTHON: cross-build/build
       CROSS_BUILD_WASI: cross-build/wasm32-wasip1
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
     # No problem resolver registered as one doesn't currently exist for Clang.