update jdk and deps-ckeck plugin

.drone.yml

@@ -15,25 +15,25 @@ trigger:
 steps:
   # test if it compiles correctly
   - name: build
-    image: maven:3-eclipse-temurin-16
+    image: maven:3-eclipse-temurin-21
     commands:
       - mvn verify --no-transfer-progress -DskipTests=true -Dmaven.javadoc.skip=true -B -V
 
   # run unit tests
   - name: test
-    image: maven:3-eclipse-temurin-16
+    image: maven:3-eclipse-temurin-21
     commands:
       - mvn test --no-transfer-progress -B -V
 
   # check maven dependencies
   - name: dependency-check
-    image: maven:3-eclipse-temurin-16
+    image: maven:3-eclipse-temurin-21
     commands:
       - mvn dependency-check:check --no-transfer-progress -B -V
 
   # run code analysis
   - name: code-analysis
-    image: maven:3-eclipse-temurin-16
+    image: maven:3-eclipse-temurin-21
     commands:
       - mvn sonar:sonar --no-transfer-progress -Dsonar.projectKey=$SONAR_PROJECT_KEY -Dsonar.host.url=$SONAR_INSTANCE_URL -Dsonar.login=$SONAR_LOGIN_KEY -B -V
     environment:
@@ -64,7 +64,7 @@ steps:
 
   # upload to maven repository
   - name: maven-deploy
-    image: maven:3-eclipse-temurin-16
+    image: maven:3-eclipse-temurin-21
     commands:
       - mvn deploy --no-transfer-progress -DskipTests=true -Dmaven.javadoc.skip=true -B -V -gs settings.xml -Dmaven.repo.username=$MAVEN_REPO_USERNAME -Dmaven.repo.password=$MAVEN_REPO_PASSWORD
     environment: