Update python2.7-app.yml

Author: polsala

.github/workflows/python2.7-app.yml

@@ -12,7 +12,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       # You can use PyPy versions in python-version.
       # For example, pypy2 and pypy3
@@ -39,4 +39,4 @@ jobs:
           pip install -r requirements-dev.txt
       - name: Test with mamba
         run: |
-          mamba --enable-coverage
+          mamba --enable-coverage