Update test.yml

Test execution with Python v3.10

Author: ashah-splunk

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         os:
           - ubuntu-latest
-        python: [ 3.7, 3.9]
+        python: [ 3.7, 3.9, 3.10]
         splunk-version:
           - "8.2"
           - "latest"