Merge pull request #6 from tekktrik/doc/add-product-link

Add product link to docs

Author: tekktrik

docs/index.rst

@@ -27,6 +27,8 @@ Table of Contents
 .. toctree::
     :caption: Related Products
 
+    SI1145 Digital UV Index / IR / Visible Light Sensor <https://www.adafruit.com/product/1777>
+
 .. toctree::
     :caption: Other Links