doc: fix dead link in go_faq

Change-Id: I8a9e4d00247fe9bda6e19551850bdec0367df2e1
Reviewed-on: https://go-review.googlesource.com/82157Reviewed-by: Ian Lance Taylor <iant@golang.org>

doc/go_faq.html

@@ -1152,7 +1152,7 @@ document</a> for details.
 Work is underway on an experimental package management tool,
 <a href="https://github.com/golang/dep"><code>dep</code></a>, to learn
 more about how tooling can help package management. More information can be found in
-<a href="https://github.com/golang/dep/blob/master/FAQ.md">the <code>dep</code> FAQ</a>.
+<a href="https://github.com/golang/dep/blob/master/docs/FAQ.md">the <code>dep</code> FAQ</a>.
 </p>
 
 <h2 id="Pointers">Pointers and Allocation</h2>