deploy from branch

Author: valentina-s

.github/workflows/deploy-book.yml

@@ -4,8 +4,8 @@ name: deploy-book
 on:
   push:
     branches:
-    - master
     - main
+    - lesson_content
     # If your git repository has the Jupyter Book within some-subfolder next to
     # unrelated files, you can make this run only if a file within that specific
     # folder has been modified.