Fix not using GIN index for account search queries (#19830)

app/models/account.rb

@@ -445,7 +445,7 @@ class Account < ApplicationRecord
 
   class << self
     DISALLOWED_TSQUERY_CHARACTERS = /['?\\:‘’]/.freeze
-    TEXTSEARCH = "(setweight(to_tsvector('simple', accounts.display_name), 'A') || setweight(to_tsvector('simple', accounts.username), 'A') || setweight(to_tsvector('simple', coalesce(accounts.domain, '')), 'C'))"
+    TEXTSEARCH = "(setweight(to_tsvector('simple', accounts.display_name), 'A') || setweight(to_tsvector('simple', accounts.username), 'B') || setweight(to_tsvector('simple', coalesce(accounts.domain, '')), 'C'))"
 
     REPUTATION_SCORE_FUNCTION = '(greatest(0, coalesce(s.followers_count, 0)) / (greatest(0, coalesce(s.following_count, 0)) + 1.0))'
     FOLLOWERS_SCORE_FUNCTION  = 'log(greatest(0, coalesce(s.followers_count, 0)) + 2)'