Link landing pages from homepage (#266)

* Link landing pages from homepage

* Don't use Markdown here

We can't use Markdown inside this caller because it adds `p` around violating
the validator :(

Author: humitos

content/pages/homepage.html

@@ -109,7 +109,7 @@ <h3 class="ui large monospace header">
           <div class="ui centered vertically padded container stackable grid">
 
             {% call homepage.feature_detail_item(header="Supports any doc tool", icon="fad fa-terminal") %}
-              Integrated support for Sphinx, MkDocs, and Jupyter Book.
+              Integrated support for <strong><a href="/tools/sphinx/">Sphinx</a></strong>, <strong><a href="/tools/mkdocs/">MkDocs</a></strong>, <strong><a href="/tools/jupyter-book/">Jupyter Book</a></strong>.
               Flexible enough to work with any documentation tool.
             {% endcall %}