Update README.md

Author: bootjp

README.md

@@ -4,6 +4,7 @@
 middleware for path-based authentication of labstack echo. Best when using apikey for path.
 
 example) https://example.com/api/this_is_api_key
+
 This `this_is_api_key` part can be dynamically submitted to authentication.
 For example, whether apikey is active, RateLimit is not exceeded, etc.