build(deps): bump actions/checkout from 5 to 6 (#691)

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/integration-tests.yml

@@ -17,7 +17,7 @@ jobs:
         node-version: [20, 22, 24]
     steps:
       - name: Check out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Node ${{ matrix.node-version }}
         uses: actions/setup-node@v5

.github/workflows/preview.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install
         uses: ./.github/composite-actions/install

.github/workflows/publish.yml

@@ -20,7 +20,7 @@ jobs:
       id-token: write # to enable use of OIDC for trusted publishing and npm provenance
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           persist-credentials: false