Remove 3.11 from CI

Author: Luke Hinds

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.11", "3.12"]
+        python-version: ["3.12"]
 
     steps:
     - name: Checkout github repo