Replace GH CI Java 24 with 25

Replace Java 25-ea with Java 26-ea

Author: garydgregory

.github/workflows/maven.yml

@@ -31,10 +31,10 @@ jobs:
         java: [ 8, 11, 17, 21 ]
         experimental: [false]
         include:
-          - java: 24
+          - java: 25
             os: ubuntu-latest
             experimental: true
-          - java: 25-ea
+          - java: 26-ea
             os: ubuntu-latest
             experimental: true