switch to 311 for linux tests

Author: robertjwilson

.github/workflows/python-app-linux.yml

@@ -27,7 +27,7 @@ jobs:
         with:
           micromamba-version: '1.4.5-0'
           environment-name: foo
-          create-args: cdo=2.4.0 nco cartopy python=3.10
+          create-args: cdo=2.4.0 nco cartopy python=3.11
           init-shell: >-
             bash
           cache-environment: true