ref-manual: Fixed grammar use in "Image Features" list.

(From yocto-docs rev: eb4ff8e1345987391e735f088d685ec70e641ed1)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/ref-features.xml

@@ -264,7 +264,7 @@
                     </para></listitem>
                 <listitem><para><emphasis>staticdev-pkgs:</emphasis>
                     Installs static development packages, which are
-                    static libraries (e.g. <filename>*.a</filename> files), for
+                    static libraries (i.e. <filename>*.a</filename> files), for
                     all packages installed in a given image.
                     </para></listitem>
             </itemizedlist>