Add missing redirect to the main gh page

[sovrasov]

What does this PR do?

Redirect to the latest docs folder was missing:
it hasn't been created initially and git commit -a didn't add it later

Fixes # (issue)

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?