only test on 3.11

Author: peterdudfield

.github/workflows/workflows.yaml

@@ -18,4 +18,4 @@ jobs:
       sudo_apt_install: "libgeos++-dev libproj-dev proj-data proj-bin"
       #      brew_install: "proj geos librttopo"
       os_list: '["ubuntu-latest"]'
-      python-version: "['3.10','3.11']"
+      python-version: "['3.11']"