Cache gradle files on CI (#952)

.github/workflows/run-check.yml

@@ -22,6 +22,19 @@ jobs:
           # https://github.community/t/push-from-action-even-with-pat-does-not-trigger-action/17622
           persist-credentials: false
 
+      - name: Validate Gradle Wrapper
+        uses: gradle/wrapper-validation-action@27152f6fa06a6b8062ef7195c795692e51fc2c81 #v2.0.0
+
+      - name: Cache Gradle Files
+        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-v2-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-v2-
+
       - name: Configure Ruby
         uses: ruby/setup-ruby@360dc864d5da99d54fcb8e9148c14a84b90d3e88 # v1.165.1
         with: