Fixed receive-mail - generated error when comment was removed

roles/email/files/receive-mail

@@ -45,7 +45,7 @@ rescue StandardError => ex
 end
 
 def post_email(_recipient, mail, env)
-	endpoint = "{env['DISCOURSE_BASE_URL']}/admin/email/handle_mail"	
+	endpoint = "#{env['DISCOURSE_BASE_URL']}/admin/email/handle_mail"	
 	key      = env["DISCOURSE_API_KEY"]
 	username = env["DISCOURSE_API_USERNAME"]