FIX: Capybara diet upgrade, can eat real 🌿 now (#11040)

More seriously: discobot wasn't reacting properly if users used their
emoji keyboard to insert a real herb emoji, which works just as well
in a real post.

While we're here, use String#include? instead of constructing a new regexp.

https://meta.discourse.org/t/capybaras-dont-eat-real-emojis/168361

plugins/discourse-narrative-bot/lib/discourse_narrative_bot/new_user_narrative.rb

@@ -141,6 +141,10 @@ module DiscourseNarrativeBot
       ':herb:'
     end
 
+    def self.search_answer_emoji
+      "\u{1F33F}"
+    end
+
     def self.reset_trigger
       I18n.t('discourse_narrative_bot.new_user_narrative.reset_trigger')
     end
@@ -567,7 +571,7 @@ module DiscourseNarrativeBot
       post_topic_id = @post.topic_id
       return unless valid_topic?(post_topic_id)
 
-      if @post.raw.match(/#{NewUserNarrative.search_answer}/)
+      if @post.raw.include?(NewUserNarrative.search_answer) || @post.raw.include?(NewUserNarrative.search_answer_emoji)
         fake_delay
         reply_to(@post, I18n.t("#{I18N_KEY}.search.reply", i18n_post_args(search_url: url_helpers(:search_url))))
       else