Update README.rst to encourage users to a fork of pure-python-adb

Diff between the published package and this repo is:

Swind/pure-python-adb@master...spm5065:pure-python-adb:master

And potentially spm5065/pure-python-adb#4

Author: CloCkWeRX

README.rst

@@ -52,4 +52,4 @@ A collection of useful intents and commands can be found `here <https://gist.git
 Acknowledgments
 ---------------
 
-This is based on `python-firetv <https://github.com/happyleavesaoc/python-firetv>`_ by happyleavesaoc and the `androidtv component for Home Assistant <https://github.com/a1ex4/home-assistant/blob/androidtv/homeassistant/components/media_player/androidtv.py>`_ by a1ex4, and it depends on the Python packages `adb-shell <https://github.com/JeffLIrion/adb_shell>`_ (which is based on `python-adb <https://github.com/google/python-adb>`_) and `pure-python-adb <https://github.com/Swind/pure-python-adb>`_.
+This is based on `python-firetv <https://github.com/happyleavesaoc/python-firetv>`_ by happyleavesaoc and the `androidtv component for Home Assistant <https://github.com/a1ex4/home-assistant/blob/androidtv/homeassistant/components/media_player/androidtv.py>`_ by a1ex4, and it depends on the Python packages `adb-shell <https://github.com/JeffLIrion/adb_shell>`_ (which is based on `python-adb <https://github.com/google/python-adb>`_) and a forked, more maintained version of `pure-python-adb <https://github.com/spm5065/pure-python-adb>`_.