Build(deps): Bump actions/checkout from 5 to 6

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]>

Author: dependabot[bot]

.github/workflows/cargo-build-and-test.yml

@@ -22,7 +22,7 @@ jobs:
         toolchain:
           - stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Cargo Cache
         uses: actions/cache@v4
         with:

.github/workflows/check-links.yml

@@ -10,7 +10,7 @@ jobs:
   check-links:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: gaurav-nelson/github-action-markdown-link-check@v1
         with:
           use-quiet-mode: "yes"

.github/workflows/pre-commit.yml

@@ -9,7 +9,7 @@ jobs:
   pre-commit:
     runs-on: [ubuntu-latest]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: pre-commit/[email protected]
       - uses: pre-commit-ci/[email protected]