Dashboard: Update docs link (#10441)

Update docs link for webhook

Author: benjaoming

readthedocs/templates/projects/integration_webhook_detail.html

@@ -65,7 +65,7 @@
     <p>
       {% blocktrans trimmed %}
         For more information on manually configuring a webhook, refer to
-        <a href="https://docs.readthedocs.io/page/webhooks.html">
+        <a href="https://docs.readthedocs.io/page/guides/setup/git-repo-automatic.html">
           our webhook documentation
         </a>
       {% endblocktrans %}