Release Maven Archetype with Java 26 support

### Affected version

3.4.1

### Bug description

Currently, maven-archetype 3.4.1 is not usable when Maven is run on Java 26.

During archetype integration tests, the build fails with:

java.lang.IllegalArgumentException: Unsupported class file major version 70

The exception originates from Groovy during archetype generation.

This appears to be similar to previous Java compatibility issues addressed for newer JDK releases (e.g. #942 and #265).

I think this has already been fixed by commit 81557ff. If that is correct, would it be possible to publish a new Maven Archetype release containing this change so that Java 26 users can use the plugin without requiring custom snapshots or local builds?

Affected version: 3.4.1

Java version: 26

Start by reviewing commit 81557ff and the related compatibility issues #942 and #265. Run the archetype integration tests with Java 26 to confirm the failure and verify that the commit addresses it. Done means a Maven Archetype release containing the fix is published for Java 26 users.

Written by the indexing model from the issue text.