add one more tests for 3.10 and latest sphinx version

Author: Chilipp

.github/workflows/python-app.yml

@@ -17,6 +17,9 @@ jobs:
         python-version: ["3.6", "3.7", "3.8", "3.9"]
         sphinx-version: ["", "4.5", "4.4", "4.3", "4.2", "4.1", "4.0.*", "3.5.*", "3.4.*", "3.2.*",  "3.1.*", "3.0.*"]
         include:
+        include:
+          - python-version: "3.10"
+            sphinx-version: ""
           - python-version: "3.10"
             sphinx-version: "4.5"