OPENNLP-1686: Adjust GH CI config to build with Java 24-ea

Author: rzo1

.github/workflows/maven.yml

@@ -34,7 +34,7 @@ jobs:
         java: [ 17, 21 ]
         experimental: [false]
         include:
-          - java: 23-ea
+          - java: 24-ea
             os: ubuntu-latest
             experimental: true