Test with Java 8 only

Author: reneleonhardt

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [8, 11, 17, 21]
+        java: [8] # , 11, 17, 21
     steps:
     - name: Checkout project
       uses: actions/checkout@v4