[erlang-patches] fix a URL in REAMDE.md

[YAMAMOTO Takashi]

hi,

http://www.erlang.org/faq.html looks stale.

git fetch https://github.com/yamt/otp fix-url
https://github.com/yamt/otp/compare/fix-url
https://github.com/yamt/otp/compare/fix-url.patch

YAMAMOTO Takashi