Corrected the Twitter handle for Rep. John Sarbanes

His official site links to [@RepSarbanes](https://twitter.com/RepSarbanes) (a confirmed account) here:
http://sarbanes.house.gov/frontpage

...though [@RepJohnSarbanes](https://twitter.com/RepJohnSarbanes) (an account by the name of "Big Prosperity" with the bio saying "Getting a Break from Social since i'm Making $350 for each day earning a living live on the internet from home. My personal goals in the end grew reality.") is linked on his official site here:
http://sarbanes.house.gov/about-john

I propose making this file change to boldly cause /congress-legislators to be less sloppy than legislators in Congress.