#134: use ubuntu 22.04 for supporting python 3.6 and 3.7

Author: evgeny-ezhov

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
         run: ruff format --check webdav3/ tests/
 
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix: