[Java] Use gradle 8.14 for adaptive sampling sample application (#454)

Author: majanjua-amzn

.github/workflows/java-sample-app-s3-deploy.yml

@@ -252,6 +252,11 @@ jobs:
           role-to-assume: arn:aws:iam::${{ env.ACCOUNT_ID }}:role/${{ env.E2E_TEST_ROLE_NAME }}
           aws-region: us-west-2
 
+      - name: Setup Gradle 8.14
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          gradle-version: '8.14'
+
       - name: Build and Upload Main JAR
         working-directory: sample-apps/java/springboot-main-service
         run: |