Add path_to_docs

Author: danielballan

conf.py

@@ -50,6 +50,7 @@
 html_theme_options = {
     "repository_url": "https://github.com/scientific-python/executable-tutorials",
     "repository_branch": "main",
+    "path_to_docs": "tutorials",
     "use_repository_button": True,
     "use_issues_button": True,
     "use_edit_page_button": True,