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/check-links.yml

@@ -10,7 +10,7 @@ jobs:
     permissions:
       issues: write  # required for peter-evans/create-issue-from-file
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Install uv
         uses: astral-sh/setup-uv@v7
       - name: Build documentation

.github/workflows/copilot-setup-steps.yml

@@ -18,7 +18,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - uses: astral-sh/setup-uv@v7
 

.github/workflows/generate.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - name: Install uv
       uses: astral-sh/setup-uv@v7
     - name: Generate grants

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - name: Install uv
       uses: astral-sh/setup-uv@v7
     - name: Test