add favicon (#24)

Co-authored-by: Stefan Romainczyk <s.romainczyk@peak-solution.de>

Author: StefanRR

data_management_learning_path/_config.yml

@@ -45,8 +45,9 @@ repository:
 # Add GitHub buttons to your book
 # See https://jupyterbook.org/customize/config.html#add-a-link-to-your-repository
 html:
-  use_issues_button: true
-  use_repository_button: true
+  favicon                   : favicon.ico  # A path to the favicon for the book
+  use_issues_button         : true
+  use_repository_button     : true
 
 sphinx:
   extensions: