Add link to Tuff Mod Docs in index.html

Author: UplandJacob

index.html

@@ -47,6 +47,7 @@ <h3>Quick Links</h3>
           <div class="link-group">
             <a href="https://github.com/TuffNetwork/TuffXPlus/releases/download/1.0.0/TuffXPlus-1.0.0.jar" download class="btn btn-primary">Download TuffX+ Plugin 1.0.0</a>
             <a href="https://github.com/TuffNetwork/Tuff-Client-Builds/releases/tag/1.1UT14" class="btn btn-secondary">GitHub Releases</a>
+            <a href="https://github.com/TuffNetwork/tufftest/blob/v2/ModDocs.md" class="btn btn-secondary">Tuff Mod Docs</a>
           </div>
         </div>