Bump actions/cache from 4.3.0 to 5.0.1

Bumps [actions/cache](https://github.com/actions/cache) from 4.3.0 to 5.0.1.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@0057852...9255dc7)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 5.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/markdown.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
     - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
     - name: Restore lychee cache
-      uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+      uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v4
       with:
          path: .lycheecache
          key: cache-lychee-${{ github.sha }}