change 'travis-ci.org' to 'travis-ci.com'

Author: sommersoft

README.rst

@@ -9,8 +9,8 @@ Introduction
     :target: https://adafru.it/discord
     :alt: Discord
 
-.. image:: https://travis-ci.org/adafruit/Adafruit_CircuitPython_ADS1x15.svg?branch=master
-    :target: https://travis-ci.org/adafruit/Adafruit_CircuitPython_ADS1x15
+.. image:: https://travis-ci.com/adafruit/Adafruit_CircuitPython_ADS1x15.svg?branch=master
+    :target: https://travis-ci.com/adafruit/Adafruit_CircuitPython_ADS1x15
     :alt: Build Status
 
 Support for the ADS1x15 series of analog-to-digital converters. Available in 12-bit (ADS1015)