Correct spelling

Author: rachmari

server.rb

@@ -126,7 +126,7 @@ def verify_webhook_signature
 
       # The X-GITHUB-EVENT header provides the name of the event.
       # The action value indicates the which action triggered the event.
-      logger.debug "---- recevied event #{request.env['HTTP_X_GITHUB_EVENT']}"
+      logger.debug "---- received event #{request.env['HTTP_X_GITHUB_EVENT']}"
       logger.debug "----    action #{@payload['action']}" unless @payload['action'].nil?
     end