feat: upgrade all ci steps to jdk 21

.gitlab-ci.yml

@@ -41,13 +41,13 @@ build:
     - ./mvnw $MAVEN_CLI_OPTS clean install -DskipTests --no-transfer-progress -T2
 
 test:
-  image: eclipse-temurin:11.0.22_7-jdk
+  image: eclipse-temurin:21.0.2_13-jdk-alpine
   stage: test
   script:
     - ./mvnw $MAVEN_CLI_OPTS verify --no-transfer-progress -T2
 
 package:
-  image: eclipse-temurin:11.0.22_7-jdk
+  image: eclipse-temurin:21.0.2_13-jdk-alpine
   stage: package
   before_script: &gpg-setup
     - apt-get update
@@ -69,7 +69,7 @@ package:
   when: manual
 
 deploy:
-  image: eclipse-temurin:11.0.22_7-jdk
+  image: eclipse-temurin:21.0.2_13-jdk-alpine
   stage: deploy
   before_script: *gpg-setup
   script: