Update README.rst

Author: ladyada

README.rst

@@ -2,7 +2,7 @@
 ============
 
 .. image:: https://readthedocs.org/projects/adafruit-circuitpython-MAX31855/badge/?version=latest
-    :target: https://circuitpython.readthedocs.io/projects/MAX31855/en/latest/
+    :target: https://circuitpython.readthedocs.io/projects/max31855/en/latest/
     :alt: Documentation Status
 
 .. image :: https://img.shields.io/discord/327254708534116352.svg
@@ -116,4 +116,4 @@ Now, once you have the virtual environment activated:
 
 This will output the documentation to ``docs/_build/html``. Open the index.html in your browser to
 view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to
-locally verify it will pass.
+locally verify it will pass.