Fix pagination of followed tags (#20861)

* Fix missing pagination headers on followed tags

* Fix typo

app/controllers/api/v1/followed_tags_controller.rb

@@ -3,11 +3,11 @@
 class Api::V1::FollowedTagsController < Api::BaseController
   TAGS_LIMIT = 100
 
-  before_action -> { doorkeeper_authorize! :follow, :read, :'read:follows' }, except: :show
+  before_action -> { doorkeeper_authorize! :follow, :read, :'read:follows' }
   before_action :require_user!
   before_action :set_results
 
-  after_action :insert_pagination_headers, only: :show
+  after_action :insert_pagination_headers
 
   def index
     render json: @results.map(&:tag), each_serializer: REST::TagSerializer, relationships: TagRelationshipsPresenter.new(@results.map(&:tag), current_user&.account_id)
@@ -43,7 +43,7 @@ class Api::V1::FollowedTagsController < Api::BaseController
   end
 
   def records_continue?
-    @results.size == limit_param(TAG_LIMIT)
+    @results.size == limit_param(TAGS_LIMIT)
   end
 
   def pagination_params(core_params)