chore(deps): bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Verify language-first layout
         run: scripts/check-repository-layout.sh
@@ -30,7 +30,7 @@ jobs:
     needs: repository-layout
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Rust 1.95
         run: |
@@ -59,7 +59,7 @@ jobs:
         java: ['25']
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v4

.github/workflows/dependency-review.yml

@@ -13,7 +13,7 @@ jobs:
     name: dependency vulnerability scan
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: actions/dependency-review-action@v5
         with:
           fail-on-severity: high

.github/workflows/javadocs.yml

@@ -24,7 +24,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up JDK 25
         uses: actions/setup-java@v4

.github/workflows/nightly-live.yml

@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 20
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up JDK 25
         uses: actions/setup-java@v4

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
       HOMEBREW_TAP_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up JDK 25
         uses: actions/setup-java@v4