Update pythonpackage.yml

Author: fgregg

.github/workflows/pythonpackage.yml

@@ -33,7 +33,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [windows-latest, macos-latest, ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11-dev"]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
 
     steps:
     - uses: actions/checkout@v2