build(deps): bump actions/cache from 3.3.3 to 4.0.0

Bumps [actions/cache](https://github.com/actions/cache) from 3.3.3 to 4.0.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3.3.3...v4.0.0)

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

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

.github/workflows/CI.yaml

@@ -220,7 +220,7 @@ jobs:
         ./install-user-client
 
     - name: Restore Clang Tidy cache
-      uses: actions/cache/restore@v3.3.3
+      uses: actions/cache/restore@v4.0.0
       with:
         # since the ctcache is just a list of checksums that were checked, we want to write to it every ci run to keep it up to date
         # otherwise github actions just restores some old cache if the key didn't change
@@ -243,7 +243,7 @@ jobs:
         PATH=~/.local/bin:"$PATH" CTCACHE_DIR=/tmp/ci-ctcache ../util/clang-tidy.sh
 
     - name: Save Clang Tidy cache
-      uses: actions/cache/save@v3.3.3
+      uses: actions/cache/save@v4.0.0
       # always run, except if the workflow was cancelled
       # this means clang tidy will get cached even if some checks are failing
       if: success() || failure()