upgrading actions/cache version to latest

Author: ianbotsf

.github/workflows/continuous-integration.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       with:
         path: |
           ~/.gradle/caches
@@ -38,7 +38,7 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       with:
         path: |
           ~/.gradle/caches
@@ -61,4 +61,4 @@ jobs:
         uses: ./.github/actions/configure-gradle
       - name: Build and Test ${{ env.PACKAGE_NAME }}
         run: |
-          ./gradlew build
+          ./gradlew build