capital P for WordPress

small change.

ref https://codex.wordpress.org/Function_Reference/capital_P_dangit
http://justintadlock.com/archives/2010/07/08/lowercase-p-dangit

README.md

@@ -128,7 +128,7 @@ See also [Static Site Generators](#static-site-generators), [Content Management
   * [Noddity](http://noddity.com/) - It's a blog, it's a wiki, it's a fast CMS! ([Source Code](https://github.com/TehShrike/noddity)) `WTFPL` `Nodejs`
   * [PluXml](http://www.pluxml.org/) - XML-based blog/CMS platform. ([Source Code](https://github.com/pluxml/PluXml)) `GPL` `PHP`
   * [Wagtail](https://wagtail.io/) - A Django content management system focused on flexibility and user experience. ([Source Code](https://github.com/torchbox/wagtail)) `BSD` `Python`
-  * [Wordpress](https://wordpress.org/) - Create a beautiful website or blog. ([Source Code](https://github.com/WordPress/WordPress)) `GPLv2`
+  * [WordPress](https://wordpress.org/) - Create a beautiful website or blog. ([Source Code](https://github.com/WordPress/WordPress)) `GPLv2`
 
 
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