build(deps): bump actions/checkout from 5 to 6 (#3979)

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.yml

@@ -16,7 +16,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: ./.github/setup
@@ -46,7 +46,7 @@ jobs:
   incremental_mutation_testing:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/setup
       - name: Install Playwright Browsers
         run: npx playwright install chromium --with-deps

.github/workflows/mutation-testing.yml

@@ -10,7 +10,7 @@ jobs:
   nodejs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/setup
       - run: npx nx run metrics:stryker
         env:
@@ -21,7 +21,7 @@ jobs:
   elements:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/setup
       - name: Install Playwright Browsers
         run: npx playwright install chromium --with-deps
@@ -33,7 +33,7 @@ jobs:
   metrics-scala:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/setup
         with:
           setup-java: true

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
       contents: read
       id-token: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: ./.github/setup

.github/workflows/update-screenshots.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           app-id: ${{ vars.STRYKER_MUTATOR_APP_ID }}
           private-key: ${{ secrets.STRYKER_MUTATOR_NPA_KEY }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           token: ${{ steps.generate-token.outputs.token }}
           persist-credentials: false