Modify test-notebooks.yml to run manually and on push to main (#355)

* Workflow now running manually on button press

* ignoring changes to docs

.github/workflows/test-notebooks.yml

@@ -1,6 +1,11 @@
 name: Test Notebooks
 on:
   workflow_dispatch: # Allows manual triggering
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'docs/**'
 jobs:
   test-notebooks:
     runs-on: ubuntu-latest