fix grammar error

Author: aserafin

README.md

@@ -1589,7 +1589,7 @@ class API < Grape::API
 end
 ```
 
-For similar to Rails request logging try [grape_logging](https://github.com/aserafin/grape_logging) gem.
+For similar to Rails request logging try the [grape_logging](https://github.com/aserafin/grape_logging) gem.
 
 ## API Formats