website: Update documentation link

website/content/_index.html

@@ -39,4 +39,4 @@ <h2>Use In Your App</h2>
 
 <h2>Public Transport Coverage</h2>
 <p>If you know were to find public transport data for your region, or if you are a public transport operator, you can help by adding the feed to our data set.</p>
-<a class="btn btn-primary theme-button text-black" href="https://public-transport.github.io/transitous/#adding-a-region"><i class="bi bi-arrow-right m-1"></i>Contributor Documentation</a>
+<a class="btn btn-primary theme-button text-black" href="https://transitous.org/doc#adding-a-region"><i class="bi bi-arrow-right m-1"></i>Contributor Documentation</a>