Bump JVM to 21 in order to support latest sdk-test-suite

Author: tillrohrmann

.github/workflows/integration.yaml

@@ -87,16 +87,16 @@ jobs:
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: '17'
+          java-version: '21'
 
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v3
 
       - name: Build restatedev/java-test-services image
         run: ./gradlew -Djib.console=plain :test-services:jibDockerBuild
 
-      - name: Run test tool 2.2
-        uses: restatedev/sdk-test-suite@v2.2
+      - name: Run test tool 2.3
+        uses: restatedev/sdk-test-suite@v2.3
         with:
           envVars: ${{ inputs.envVars }}
           testArtifactOutput: ${{ inputs.testArtifactOutput != '' && inputs.testArtifactOutput || 'sdk-java-integration-test-report' }}