Update build.yml

Author: mirkosertic

.github/workflows/build.yml

@@ -5,7 +5,7 @@ on:
 jobs:
   build:
     environment: ci
-    runs-on: 'ubuntu-20.04'
+    runs-on: 'ubuntu-22.04'
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v2