Make the python docs codeownership more targeted (vercel#3840)

* Make the python docs codeownership more targetted

I had originally left it broad so that things would be smooth when we
start reorganizing the python docs, but we'll adjust that when it
happens.

* Update .github/CODEOWNERS

Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>
Signed-off-by: Michael J. Sullivan <sully@msully.net>

---------

Signed-off-by: Michael J. Sullivan <sully@msully.net>
Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>

Author: msullivan

.github/CODEOWNERS

@@ -1,4 +1,4 @@
 # Default owners for the entire repository
 * @vercel/workflow
 
-/docs @vercel/workflow @msullivan @fantix
+/docs/**/python.mdx @vercel/workflow @msullivan @fantix