updated README; wrong CoC link

Author: sommersoft

README.rst

@@ -99,7 +99,7 @@ Contributing
 ============
 
 Contributions are welcome! Please read our `Code of Conduct
-<https://github.com/adafruit/Adafruit_CircuitPython_VEML6070/blob/master/CODE_OF_CONDUCT.md>`_
+<https://github.com/adafruit/Adafruit_CircuitPython_DS1307/blob/master/CODE_OF_CONDUCT.md>`_
 before contributing to help this project stay welcoming.
 
 Building locally