Use correct activity id in Accept when receiving duplicate Follow (fixes #8218) (#8244)

app/lib/activitypub/activity/follow.rb

@@ -13,7 +13,7 @@ class ActivityPub::Activity::Follow < ActivityPub::Activity
 
     # Fast-forward repeat follow requests
     if @account.following?(target_account)
-      AuthorizeFollowService.new.call(@account, target_account, skip_follow_request: true)
+      AuthorizeFollowService.new.call(@account, target_account, skip_follow_request: true, follow_request_uri: @json['id'])
       return
     end
 

app/services/authorize_follow_service.rb

@@ -3,7 +3,7 @@
 class AuthorizeFollowService < BaseService
   def call(source_account, target_account, **options)
     if options[:skip_follow_request]
-      follow_request = FollowRequest.new(account: source_account, target_account: target_account)
+      follow_request = FollowRequest.new(account: source_account, target_account: target_account, uri: options[:follow_request_uri])
     else
       follow_request = FollowRequest.find_by!(account: source_account, target_account: target_account)
       follow_request.authorize!