Java 17 is the minimum for the main branch

[skip ci]

Author: sebbASF

.github/workflows/maven.yml

@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        java: [ 8, 17, 21 ]
+        java: [ 17, 21 ]
         experimental: [false]
 #        include:
 #          - java: 22-ea