Use 3.11 stable for tests

Author: BobDotCom

.github/workflows/python-app.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11-dev"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
     env:
       OS: ${{ matrix.os }}
       PYTHON: ${{ matrix.python-version }}