Update comment about required phpcs version

See #378 (comment).

Author: JDGrimes

README.md

@@ -31,7 +31,7 @@ For convenience of using `phpcs` as global command you might want to add path to
 
 1. Install PHP_CodeSniffer by following its [installation instructions](https://github.com/squizlabs/PHP_CodeSniffer#installation) (via Composer, PEAR, or Git checkout).
 
-  Do ensure, if for example you're using [VVV](https://github.com/Varying-Vagrant-Vagrants/VVV), that you have the **latest version** of CodeSniffer (earlier versions, e.g. ~1.5.5, may warn about incorrect line indentation on every single line even if your code is actually correct.)
+  Do ensure, if for example you're using [VVV](https://github.com/Varying-Vagrant-Vagrants/VVV), that PHP_CodeSniffer's version matches our requirements (you can check the required version in [composer.json](composer.json#L18)).
 
 2. Clone WordPress standards repository: