Grammar improvement

Author: hxtree

README.md

@@ -14,7 +14,7 @@
 </p>
 
 ## About
-PHPMarkup is a lightweight markup processor standard written in PHP. 
+PHPMarkup is a lightweight markup processor written in PHP. 
 It facilitates the extraction of markup into a data structure, orchestrated manipulation of said structure, and output as 
 (optimized) markup and uses the [LHTML](https://github.com/Ouxsoft/LHTML) standard.