Merge pull request 'Fix contribute link' (#43) from fix-contribute-link into main

Reviewed-on: #43

source/_nav.erb

@@ -1,7 +1,7 @@
 <nav>
   <ul>
     <li>
-       <a href="https://contribute.joinplu.me">Contribute</a>
+       <a href="https://docs.joinplu.me/contribute/">Contribute</a>
     </li>
     <li>
        <a href="https://docs.joinplu.me">Documentation</a>

source/index.html.erb

@@ -103,7 +103,7 @@
         <p>
           We are not only welcoming coders, but really anyone who wants to help: translators, user experience designers, people with communication skills, or anybody else who feels like they can offer something to move the project ahead!
         </p>
-        <a href="https://contribute.joinplu.me">Discover how you can help</a>
+        <a href="https://docs.joinplu.me/contribute/">Discover how you can help</a>
       </main>
     </div>
   </section>