Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `app/helpers/accounts_helper.rb`:
  Conflict due to upstream changing how followers count is displayed while we
  have an option to hide followers count.
  Ported upstream change.
- `app/views/accounts/_header.html.haml`:
  Conflict due to upstream changing how followers count is displayed while we
  have an option to hide followers count.
  Ported upstream change.
- `app/views/directories/index.html.haml`:
  Conflict due to upstream changing how followers count is displayed while we
  have an option to hide followers count.
  Ported upstream change.

app/controllers/well_known/webfinger_controller.rb

@@ -4,7 +4,6 @@ module WellKnown
   class WebfingerController < ActionController::Base
     include RoutingHelper
 
-    before_action { response.headers['Vary'] = 'Accept' }
     before_action :set_account
     before_action :check_account_suspension
 
@@ -39,10 +38,12 @@ module WellKnown
     end
 
     def bad_request
+      expires_in(3.minutes, public: true)
       head 400
     end
 
     def not_found
+      expires_in(3.minutes, public: true)
       head 404
     end