Readme.md: minor wording correction

[William-Gomez]

## XRP
XRP is a public, counterparty-less asset native to the XRP Ledger, and is designed to bridge the many different currencies in use worldwide. XRP is traded on the open-market and is available for anyone to access. The XRP Ledger was created in 2012 with a finite supply of 100 billion units of XRP. Its creators gifted 80 billion XRP to a company, now called Ripple, to develop the XRP Ledger and its ecosystem. Ripple uses XRP the help build the Internet of Value, ushering in a world in which money moves as fast and efficiently as information does today.

Last sentence in second paragraph of README.md should be changed from "Ripple uses XRP the help build the Internet of Value, ushering in a world in which money moves as fast and efficiently as information does today." to "Ripple uses XRP to help build the Internet of Value, ushering in a world in which money moves as fast and efficiently as information does today."