chore: update cache version

Author: agronick

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
           java-version: '19'
 
       - name: Cache Gradle and wrapper
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.gradle/caches
@@ -40,7 +40,7 @@ jobs:
         run: echo ${{ secrets.DEBUG_KEYSTORE }} | base64 -d > $HOME/debug.keystore
 
       - name: Cache Gradle and wrapper
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.gradle/caches