removed extra line in README.rst

Author: mrmcwethy

README.rst

@@ -2,9 +2,7 @@ Introduction
 ============
 
 .. image:: https://readthedocs.org/projects/adafruit-circuitpython-rgb_display/badge/?version=latest
-
     :target: https://circuitpython.readthedocs.io/projects/rgb_display/en/latest/
-
     :alt: Documentation Status
 
 .. image :: https://img.shields.io/discord/327254708534116352.svg