fixed faq link

[ParthS28]

For short term contributors: we understand that getting your commits well
defined like we require is a hard task and takes some learning. If you
look to help without wanting to contribute long term there's no need
for you to learn this. Just drop us a message and we'll take care of brushing
up your stuff for merge!

Checklist

• I read the commit guidelines and I've followed
  them.
• I ran coala over my code locally. (All commits have to pass
  individually. It is not sufficient to have "fixup commits" on your PR,
  our bot will still report the issues for the previous commit.) You will
  likely receive a lot of bot comments and build failures if coala does not
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When asked for a rebase, consult coala.io/rebase
instead.

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• pick up any PR at https://coala.io/review
• review it (check https://coala.io/reviewing for more info)
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The more you review, the more your score will grow at coala.io and we will
review your PRs faster!

[ParthS28]

README.rst: Fixed the FAQ link

Updates the FAQ link.

Closes #2821

[CLiu13]

Thanks! The changes LGTM. However, can you update your commit message (not the pull request message) to follow the commit guidelines? Let me know if you need help with this.

[utkarsh2102]

I'd rather use http://docs.coala.io/en/latest/Help/FAQ.html#installation-is-failing-help instead. Simply pointing to FAQ doesn't help, I believe.