Revert weekly to py311 (#649)

Author: niklassiemer

.github/workflows/weekly.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        python-version: ["3.12"]
+        python-version: ["3.11"]
 
     steps:
     - uses: actions/checkout@v2