Change Ubuntu 20.04 to 22.04

Author: andrivet

.github/workflows/tests.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python