Update README.md

Author: snapshotpl

README.md

@@ -1,13 +1,13 @@
-# request-id middleware
+# Request ID middleware for PHP
 
 [![Build Status](https://travis-ci.org/php-middleware/request-id.svg?branch=master)](https://travis-ci.org/php-middleware/request-id)
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-PSR-7 request id middleware
+PSR-7 Request ID middleware
 
-This middleware provide framework-agnostic possibility to generate and add to request/response's header request id.
+This middleware provide framework-agnostic possibility to generate and add to request/response's header Request ID (Correlation ID).
 
 ## Installation