Update README.md

Author: Dillon Korman

README.md

@@ -21,7 +21,7 @@ Installing
 --
 
 Generally, you should use [the free installer](https://www.metasploit.com/download),
-which contains all the dependencies and will get you up and running with a
+which contains all of the dependencies and will get you up and running with a
 few clicks. See the [Dev Environment Setup](http://r-7.co/MSF-DEV) if
 you'd like to deal with dependencies on your own.