use ubuntu 20.04 in CI

wsbaser · wsbaser · commit 8a2abab2091a · 2022-12-25T20:42:29.000+01:00
diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v2
