chore: Update Python version for tests to 3.11 & 3.12

From just 3.8

Author: bmtcril

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       matrix:
         os: [ ubuntu-20.04 ]
         python-version: [ '3.11','3.12' ]
-        toxenv: [ quality, docs, pytest ]
+        toxenv: [ quality, docs ]
     permissions:
       # Gives the action the necessary permissions for publishing new
       # comments in pull requests.