[ci skip] Remove style of the word Rails at the top

Author: ftovaro

railties/RDOC_MAIN.rdoc

@@ -2,7 +2,7 @@
 
 == What's \Rails
 
-<b>\Rails</b> is a web-application framework that includes everything needed to
+\Rails is a web-application framework that includes everything needed to
 create database-backed web applications according to the
 {Model-View-Controller (MVC)}[http://en.wikipedia.org/wiki/Model-view-controller]
 pattern.