Use python.typing.org for typing documentation links (#17323)

## Summary

There is a new official URL for the typing documentation:
https://typing.python.org/

Change all https://typing.readthedocs.io/ links to use the new sub
domain, which is slightly shorter and looks more official.

## Test Plan

Tested to see if each and every new URL is accessible. I noticed that
some links go to https://typing.python.org/en/latest/source/stubs.html
which seems to be outdated, but that is a separate issue. The same page
shows up for the old URL.

crates/red_knot_python_semantic/src/module_resolver/resolver.rs

@@ -168,7 +168,7 @@ impl SearchPaths {
     ///
     /// This method also implements the typing spec's [module resolution order].
     ///
-    /// [module resolution order]: https://typing.readthedocs.io/en/latest/spec/distributing.html#import-resolution-ordering
+    /// [module resolution order]: https://typing.python.org/en/latest/spec/distributing.html#import-resolution-ordering
     pub(crate) fn from_settings(
         db: &dyn Db,
         settings: &SearchPathSettings,