ci: switch to python 3.11.0b4

Author: PrettyWood

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           - '3.8'
           - '3.9'
           - '3.10'
-          - '3.11.0-alpha - 3.11'
+          - '3.11.0-beta.4'
         include:
           - rust-toolchain: stable
             python-version: '3.10'