github-action: try to change to previous ubunto version

CatarinaGamboa · CatarinaGamboa · commit 7d222ad6ae64 · 2023-05-03T14:07:02.000-04:00
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
@@ -17,7 +17,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     timeout-minutes: 5
     steps:
     - uses: actions/checkout@v3
