[conformal/btcec] ff095c: Correct verify signature example doco link.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcec
  Commit: ff095cfa8ed6a93cf7b348aa286459f9d7d3d3ef
      
https://github.com/conformal/btcec/commit/ff095cfa8ed6a93cf7b348aa286459f9d7d3d3ef
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-08-10 (Sun, 10 Aug 2014)

  Changed paths:
    M README.md

  Log Message:
  -----------
  Correct verify signature example doco link.