Remove Java 11 from build matrix

Author: joschi

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java_version: ['11', '17', '21']
+        java_version: ['17', '21']
         os: ['ubuntu-latest']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"