[CI] Adds simple cache

Change-Id: I4fed96e27119fef2f237ba4c314b6e9a1a485bc1

.github/workflows/Build.yaml

@@ -30,9 +30,19 @@ jobs:
           distribution: 'zulu'
           java-version: 11
 
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches/modules-*
+            ~/.gradle/caches/jars-*
+            ~/.gradle/caches/build-cache-*
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2
 
+      # TODO: Explain why --no-configuration-cache
       - name: Check spotless
         run: ./gradlew spotlessCheck --init-script gradle/init.gradle.kts --no-configuration-cache --stacktrace