Docs: Auth class names not updated on website

[aawadaptix]

Hi, apologies if this is a duplicate, I did not find an existing issue.

On the docs website https://www.python-httpx.org/advanced/authentication/ the class names on the Authentication page don't match the current names (BasicAuthentication --> BasicAuth). However I can see that in the repo's docs dir the source is up to date. So maybe an Actions issue?

[tomchristie]

This is resolved in #3112 ... as things currently stand it won't be updated until we roll a release.

[aawadaptix]

OK thanks!