Apache Superset: Use Python 3.9 and 3.11 on CI

Author: amotl

.github/workflows/application-apache-superset.yml

@@ -41,7 +41,7 @@ jobs:
       matrix:
         os: [ ubuntu-22.04 ]
         superset-version: [ "3.*" ]
-        python-version: [ "3.11" ]
+        python-version: [ "3.9", "3.11" ]
         cratedb-version: [ 'nightly' ]
 
     services: