ci: upgrade ubuntu runner to 22.04 (#33)

Author: Sylfwood

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ env:
 jobs:
   formatting:
     name: Check formatting
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v4