Improve a security FAQ answer.

Add a link in the CT/trust anchors answer to the pinning/trust anchors answer.

Bug: 
Change-Id: I47d1c822dcc3a1ceb4c51bedf5e2f20040a63155
Reviewed-on: https://chromium-review.googlesource.com/629203
Reviewed-by: Emily Stark <[email protected]>
Cr-Commit-Position: refs/heads/master@{#496729}
diff --git a/docs/security/faq.md b/docs/security/faq.md
index 425bcbdc..e9356da 100644
--- a/docs/security/faq.md
+++ b/docs/security/faq.md
@@ -401,10 +401,11 @@
 <a name="TOC-How-does-certificate-transparency-interact-with-local-proxies-and-filters-"></a>
 ## How does Certificate Transparency interact with local proxies and filters?
 
-Just as pinning only applies to publicly-trusted trust anchors, Chrome only
-requires Certificate Transparency (CT) for publicly-trusted trust anchors. Thus
-private trust anchors, such as for enterprise middle-boxes and AV proxies, do
-not need to be publicly logged in a CT log.
+Just as [pinning only applies to publicly-trusted trust
+anchors](#TOC-How-does-key-pinning-interact-with-local-proxies-and-filters-),
+Chrome only evaluates Certificate Transparency (CT) for publicly-trusted trust
+anchors. Thus private trust anchors, such as for enterprise middle-boxes and AV
+proxies, do not need to be publicly logged in a CT log.
 
 <a name="TOC-Can-I-use-EMET-to-help-protect-Chrome-against-attack-on-Microsoft-Windows-"></a>
 ## Can I use EMET to help protect Chrome against attack on Microsoft Windows?