Use ubuntu 22.04 instead of 20.04

Author: brunoocasali

.github/workflows/gempush.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build:
     name: Build + Publish
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v4