Lift Java version requirement

The minimum version of 17 is needed since a while and should have been
changed with the Tycho 4 upgrade already. The previous limit of the
upper version is no longer needed, all involved tools work fine with 21.

Author: Bananeweizen

pom.xml

@@ -392,7 +392,7 @@
                                     <banDuplicatePomDependencyVersions/>
                                     <requireExplicitDependencyScope/>
                                     <requireJavaVersion>
-                                        <version>[11,18)</version>
+                                        <version>[17,)</version>
                                     </requireJavaVersion>
                                     <requireMavenVersion>
                                         <version>${maven-version}</version>