Broken link in documentation

[fkohrt]

Bug description

The link on the documentation page "Common use-cases" that should redirect to the page "Sample Binder Repositories" is broken:

https://github.com/jupyterhub/binder/blob/b686a4607d9dc1253a0689436a53c89bed72918b/doc/using/using.rst#L12-L13

This has to be an easy fix, but I just don't know enough about your documentation framework to provide a patch.

Expected behaviour

Linking to https://mybinder.readthedocs.io/en/latest/examples/sample_repos.html

Actual behaviour

Linking to https://mybinder.readthedocs.io/en/latest/using/sample_repos.html

[welcome[bot]]

Thank you for opening your first issue in this project! Engagement like this is essential for open source projects! :hugs:
If you haven't done so already, check out Jupyter's Code of Conduct. Also, please try to follow the issue template as it helps other other community members to contribute more effectively. You can meet the other Jovyans by joining our Discourse forum. There is also an intro thread there where you can stop by and say Hi! :wave:
Welcome to the Jupyter community! :tada: