Update gitsubmodule to the correct repo.
Update gitsubmodule to the correct repo.

The hiredis submodule moved to https://github.com/redis/hiredis.git.
This change fixes the submodule.

badboy/hiredis-py-win,charsyam/hiredis-py,charsyam/hiredis-py,badboy/hiredis-py-win,badboy/hiredis-py-win,redis/hiredis-py,redis/hiredis-py