CI: 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](https://github.com/actions/cache/compare/v3...v4)

---
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/serenity-js-artifacts.yml

@@ -60,19 +60,19 @@ jobs:
           mkdir -p Build/CLDR
 
       - name: TimeZoneData cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ github.workspace }}/libjs-test262/Build/TZDB
           key: TimeZoneData-${{ hashFiles('Meta/CMake/time_zone_data.cmake') }}
 
       - name: UnicodeData cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ github.workspace }}/libjs-test262/Build/UCD
           key: UnicodeData-${{ hashFiles('Meta/CMake/unicode_data.cmake') }}
 
       - name: UnicodeLocale cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ github.workspace }}/libjs-test262/Build/CLDR
           key: UnicodeLocale-${{ hashFiles('Meta/CMake/locale_data.cmake') }}