Add donation link to navigation bar (#965)

Author: queengooborg

views/layout.ejs

@@ -43,6 +43,7 @@ See the LICENSE file for copyright details
       <a href="/"><span class="mdi mdi-home"> Home</span></a>
       <a href="/docs/about.md"><span class="mdi mdi-information"> About</span></a>
       <a href="/docs"><span class="mdi mdi-file-document-multiple"> Docs</span></a>
+      <a href="https://opencollective.com/open-web-docs"><span class="mdi mdi-hand-coin"></span> Donate</title>
       <a href="https://github.com/openwebdocs/mdn-bcd-collector"><span class="mdi mdi-github"> GitHub</span></a>
       <a href="/changelog">v<%- appVersion %></a>
     </nav>