ci; update check-doc job to Ubuntu 22.04

Author: auscompgeek

.github/workflows/dist.yml

@@ -43,7 +43,7 @@ jobs:
     - uses: pre-commit/[email protected]
 
   check-doc:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v3