try with ubuntu 20

Author: seancorfield

.github/workflows/test-and-snapshot.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build-and-snapshot:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v3