Add links to the SWH FAQs for AFN and general questions

This will help reduce the amount of questions AFN admins get,
which will enable faster processing of incoming AFN requests.

See-also: swh/devel/swh-docs@1c5f3b78
See-also: swh/devel/swh-docs!384
See-also: swh/devel/swh-docs#4745

swh/web/add_forge_now/assets/forge-admin-email.ejs

@@ -17,7 +17,10 @@ understanding that you are or know the contact person for this forge.
 
 In order to archive the forge contents, we will have to periodically
 pull the public repositories it contains and clone them into the
-Software Heritage archive.
+Software Heritage archive. FAQs for our processes are available:
+
+https://docs.softwareheritage.org/user/faq/#add-forge-now
+https://www.softwareheritage.org/faq/
 
 Please let us know if there are any technical issues to consider before
  we launch the archival of the public repositories hosted on your