- fix typo in directory path

PR:		197067
Differential Revision:	https://reviews.freebsd.org/D1713
Submitted by:	mathias@monnerville.com
Approved by:	wblock (mentor)

en_US.ISO8859-1/books/arch-handbook/boot/chapter.xml

@@ -70,8 +70,8 @@ $FreeBSD$
     <para>The boot process is an extremely machine-dependent
       activity.  Not only must code be written for every computer
       architecture, but there may also be multiple types of booting on
-      the same architecture.  For example, looking at
-      <filename class="directory">/usr/sys/src/boot</filename>
+      the same architecture.  For example, a directory listing of
+      <filename class="directory">/usr/src/sys/boot</filename>
       reveals a great amount of architecture-dependent code.  There is
       a directory for each of the various supported architectures.  In
       the x86-specific <filename class="directory">i386</filename>