[BRANDING] link to forgejo.org/docs instead of docs.gitea.io

(cherry picked from commit 3efafd0e083eb331ce06681351a40c4f46d7c96f)
(cherry picked from commit 148185e34b2be36fa46e8630928ee64a73768883)
(cherry picked from commit 977920fbc7de61962f588836cf814bd8b062402e)
(cherry picked from commit b2f37f092f6f9398683d2590d6592dd36a3e43ab)
(cherry picked from commit 3bcba19f55a97867f8bc7d5b81e12c38b4821f2b)
(cherry picked from commit bb553b31e7d87df7425257c757ee193cfeb5a8c2)
(cherry picked from commit fe9443b399fb636dd29b9e676399326550ddf374)

Author: earl-warren

templates/base/head_navbar.tmpl

@@ -181,7 +181,7 @@
 						{{svg "octicon-tools"}}
 						{{.locale.Tr "your_settings"}}<!-- Your settings -->
 					</a>
-					<a class="item" target="_blank" rel="noopener noreferrer" href="https://docs.gitea.io">
+					<a class="item" target="_blank" rel="noopener noreferrer" href="https://forgejo.org/docs/admin/">
 						{{svg "octicon-question"}}
 						{{.locale.Tr "help"}}<!-- Help -->
 					</a>