Tests only on PR update to avoid double-runs

Author: chris11-taylor-nttd

.github/workflows/python-tests.yml

@@ -1,11 +1,6 @@
-# This workflow will install Python dependencies, run tests and lint with a single version of Python
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-
 name: Python Tests
 
 on:
-  push:
-    branches-ignore: [ "main" ]
   pull_request:
     branches: [ "**" ]