Fixes #6732 (#6733)

Replaces 404ing link in README

Fixes #6732

Author: mmautner

README.md

@@ -102,7 +102,7 @@ programs, even if they have type errors:
 You can also try mypy in an [online playground](https://mypy-play.net/) (developed by
 Yusuke Miyazaki).
 
-[statically typed parts]: http://mypy.readthedocs.io/en/latest/basics.html#function-signatures
+[statically typed parts]: https://mypy.readthedocs.io/en/latest/getting_started.html#function-signatures-and-dynamic-vs-static-typing
 
 
 IDE & Linter Integrations