Updates locations of GeoJSON and Jupyter files

Add navigation item to global navigation

• Link to the merge request that introduced the new page: gitlab!155777 (merged)
  • Old: doc/user/project/repository/jupyter_notebooks/index.md
  • New: doc/user/project/repository/files/jupyter_notebooks/index.md
  • Old: doc/user/project/repository/geojson.md
  • New: doc/user/project/repository/files/geojson.md
• Give the MR a descriptive title.
• Optional. Link to the review app showing the new page:

Related issues

• Related to https://gitlab.com/gitlab-org/gitlab/-/issues/457784+ which tracks all the work