ignore dependabot as per https://docs.github.com/en/code-security/code-scanning/troubleshooting-code-scanning/resource-not-accessible-by-integration

Author: Mike

.github/workflows/run-python-tests.yaml

@@ -8,6 +8,7 @@ on:
   push:
     branches-ignore:
       - gh-pages
+      - 'dependabot/**'
   pull_request:
     branches-ignore:
       - gh-pages