Fix the sample account icon of Profile directory to local only (mastodon#11872)

Author: mayaeh

app/models/tag.rb

@@ -20,7 +20,7 @@
 class Tag < ApplicationRecord
   has_and_belongs_to_many :statuses
   has_and_belongs_to_many :accounts
-  has_and_belongs_to_many :sample_accounts, -> { searchable.discoverable.popular.limit(3) }, class_name: 'Account'
+  has_and_belongs_to_many :sample_accounts, -> { local.discoverable.popular.limit(3) }, class_name: 'Account'
 
   has_many :featured_tags, dependent: :destroy, inverse_of: :tag
   has_one :account_tag_stat, dependent: :destroy

app/presenters/instance_presenter.rb

@@ -33,7 +33,7 @@ def domain_count
   end
 
   def sample_accounts
-    Rails.cache.fetch('sample_accounts', expires_in: 12.hours) { Account.discoverable.popular.limit(3) }
+    Rails.cache.fetch('sample_accounts', expires_in: 12.hours) { Account.local.discoverable.popular.limit(3) }
   end
 
   def version_number