Update Support Portal Onion Services section to include a question on HSv3 client authorization
We should add a new question in the support portal e.g Why is an onion service asking me for client authorization? under support.tp.o/onionservices/#client-auth; to include details on the new client authorization interface for v3 onion services.
This section could include a link out to the Tor Browser Manual onion services section created in legacy/trac#33454 (moved) and a link out to the Community portal onion services section created in legacy/trac#33455 (moved) for setting up HSv3 client authorization