Fix GitHub repository details to correct URL.

Author: ntoll

adafruit_mpr121.py

@@ -37,7 +37,7 @@
 from micropython import const
 
 __version__ = "0.0.0-auto.0"
-__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_VL53L0X.git"
+__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_MPR121.git"
 
 # Register addresses.  Unused registers commented out to save memory.
 # pylint: disable=bad-whitespace