Bump actions/checkout from 3 to 7 in /.github/workflows

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v3...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>

.github/workflows/links-fail-fast.yml

@@ -8,7 +8,7 @@ jobs:
   linkChecker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
 
       - name: Link Checker
         uses: lycheeverse/lychee-action@v1.8.0

.github/workflows/links.yml

@@ -10,7 +10,7 @@ jobs:
   linkChecker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
 
       - name: Link Checker
         id: lychee