Fix Python2.7 testing

Author: davidmunoznovoa

Diff for: .github/workflows/python2.7-app.yml

@@ -12,7 +12,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2