Branch names are not url encoded

[taylor-schneider]

Describe the bug
The UI is not URL encoding branch names which leads to invalid URLs. For example, if the git repo has a branch named "feature/blah=blah" the UI will construct a url that contains "feature/blah-blah" rather than "feature%2fblah-blah"

To Reproduce
Steps to reproduce the behavior:

1. Open website
2. Try to view notebook in branch with special char in name (e.g. this notebook)

Expected behavior
The note book should load rather than send a 404

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version: 124.0.6367.201