fix link in index.rst

Author: dhalbert

docs/index.rst

@@ -26,7 +26,7 @@ Table of Contents
 .. toctree::
     :caption: Related Products
 
-   inline format: "* `Adafruit Feather nRF52840 Express <https://www.adafruit.com/product/4062>`_"
+    Adafruit Feather nRF52840 Express <https://www.adafruit.com/product/4062>
 
 .. toctree::
     :caption: Other Links