chore(deps): update actions/cache action to v4 (#7)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

action.yaml

@@ -66,7 +66,7 @@ runs:
   using: composite
   steps:
     # Cache Gradle dependencies to speed up builds
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       with:
         path: |
           ~/.gradle/caches