GH CI: Replace Java 23 with 24

Add Java 25-ea

Author: garydgregory

.github/workflows/maven.yml

@@ -31,8 +31,11 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
-        java: [ 8, 11, 17, 21, 23 ]
+        java: [ 8, 11, 17, 21, 24 ]
         experimental: [false]
+        include:
+            - java: 25-ea
+              experimental: true
 
     steps:
     - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2