ExactCalculator: Enable setup-java@v3 cache

Change-Id: If783fbac5364bcb24658f4e6249a9fdec279a85d
diff --git a/.github/workflows/build/action.yml b/.github/workflows/build/action.yml
index 9e9501b..547cfc1 100644
--- a/.github/workflows/build/action.yml
+++ b/.github/workflows/build/action.yml
@@ -9,6 +9,7 @@
       with:
         distribution: 'zulu'
         java-version: 17
+        cache: 'gradle'
 
     - name: Build with Gradle
       shell: bash