remove emoji from default discobot greeting PM

remove emoji from default discobot greeting PM
diff --git a/plugins/discourse-narrative-bot/config/locales/server.en.yml b/plugins/discourse-narrative-bot/config/locales/server.en.yml
index f7df201..87c794f 100644
--- a/plugins/discourse-narrative-bot/config/locales/server.en.yml
+++ b/plugins/discourse-narrative-bot/config/locales/server.en.yml
@@ -149,7 +149,7 @@ en:
       cert_title: "In recognition of successful completion of the new user tutorial"
 
       hello:
-        title: ":robot: Greetings!"
+        title: "Greetings!"
         message: |-
           Thanks for joining %{title}, and welcome!

GitHub
sha: 6db19e49