changed image to ubunto to 22.04

Author: =

.github/workflows/test.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         python-version: [ '3.6', '3.7', '3.8', '3.9', '3.10' ]