Fix java version

Author: tmiddlet2666

.github/workflows/maven-build-jdk21.yml

@@ -1,7 +1,7 @@
 # This workflow will build a Java project with Maven
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
 
-name: Java CI with Maven JDK17 - v5.1.0
+name: Java CI with Maven JDK21 - v5.1.0
 
 on:
   push: