fix: update BASE_URL to ''

Author: dgpalmieri

.github/workflows/deploy_jupyter_book.yaml

@@ -8,7 +8,7 @@ on:
 env:
   # `BASE_URL` determines the website is served from, including CSS & JS assets
   # You may need to change this to `BASE_URL: ''`
-  BASE_URL: /${{ github.event.repository.name }}
+  BASE_URL: ''
 
 permissions:
   contents: read