keep as 3.11

Author: xwings

.github/workflows/build-ci.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         #os: [windows-2019, macos-10.15, ubuntu-18.04, ubuntu-20.04]
         os: [windows-latest, ubuntu-22.04]
-        python-version: ["3.9", "3.11"]
+        python-version: ["3.11"]
         include:
           - os: ubuntu-22.04
             python-version: 3.11