Another minor typo fix

Hello. Below is another small typo fix, this time for faq/faq15.html

--- faq15.html.orig	Tue Jan  3 23:28:17 2012
+++ faq15.html	Tue Jan  3 23:35:20 2012
@@ -1296,7 +1296,7 @@
 will read the list of pkgpaths
 (<a href="http://www.openbsd.org/cgi-bin/man.cgi?query=pkgpath&amp;sektion=7&amp;manpath=OpenBSD+5.0"
  >pkgpath(7)</a>) in ~/localports and build all the packages.
-It can also install the packages after they have been build.
+It can also install the packages after they have been built.
 ~/localports would look something like:

 <blockquote><pre>