Added Thai diacritics and tone marks in HASHTAG_INVALID_CHARS_RE (#26576)

app/models/tag.rb

@@ -37,7 +37,7 @@ class Tag < ApplicationRecord
 
   HASHTAG_RE = %r{(?<![=/)\w])#(#{HASHTAG_NAME_PAT})}i
   HASHTAG_NAME_RE = /\A(#{HASHTAG_NAME_PAT})\z/i
-  HASHTAG_INVALID_CHARS_RE = /[^[:alnum:]#{HASHTAG_SEPARATORS}]/
+  HASHTAG_INVALID_CHARS_RE = /[^[:alnum:]\u0E47-\u0E4E#{HASHTAG_SEPARATORS}]/
 
   validates :name, presence: true, format: { with: HASHTAG_NAME_RE }
   validates :display_name, format: { with: HASHTAG_NAME_RE }