Update to main branch for tests workflow

Author: markpeek

.github/workflows/tests.yml

@@ -1,18 +1,15 @@
 name: Tests
 
-
 on:
   pull_request:
   push:
     branches:
-      - master
-
+      - main
 
 defaults:
   run:
     shell: bash
 
-
 jobs:
   test-python:
     name: Python Linting & Tests