build(deps): bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

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

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

.github/workflows/pr-tests.yaml

@@ -33,7 +33,7 @@ jobs:
         architecture: x64
 
     - name: Set Cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       id: cache  # name for referring later
       with:
         path: .venv/