"It's all in GitHub" isn't true anymore, update the home template (#7059)

NOTE: this commit only updates the english section

templates/home.tmpl

@@ -382,7 +382,10 @@
 					<i class="octicon octicon-code"></i> Open Source
 				</h1>
 				<p class="large">
-					It's all on <a target="_blank" rel="noopener noreferrer" href="https://github.com/go-gitea/gitea/">GitHub</a>! Join us by contributing to make this project even better. Don't be shy to be a contributor!
+Go get <a target="_blank" rel="noopener noreferrer" href="https://code.gitea.io/gitea">code.gitea.io/gitea</a>!
+Join us by <a target="_blank" rel="noopener noreferrer" href="https://github.com/go-gitea/gitea">contributing</a>
+to make this project even better.
+Don't be shy to be a contributor!
 				</p>
 			</div>
 		</div>