[Documentation]: Documentation's links lead to the url's ending with .md, and that doesn't seem to exist

[nemonemi]

What is the new or updated feature that you are suggesting?

On the documentation screen Overview: https://reactrouter.com/en/v6.3.0/getting-started/overview clicking on these links; navigates to the corresponding URLs ending with the .md, and they don't seem to exist. e.g. https://reactrouter.com/en/v6.3.0/getting-started/tutorial.md Accessing the same URL without the extension works. https://reactrouter.com/en/v6.3.0/getting-started/tutorial

Why should this feature be included?

Improves documentation usage.