update ubuntu os

Author: auvipy

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
 jobs:
     matrix:
         name: Unittest Matrix
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-22.04
         strategy:
             matrix:
                 python-version: ["3.5", "3.6", "3.7","3.8"]