dev-manual: fix rendering of ${PN}

Current markup generates italic, not monospaced.

(From yocto-docs rev: 859ba2ea1014c351a43a59c481c4498d79f30139)

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/dev-manual/prebuilt-libraries.rst

@@ -170,7 +170,7 @@ as follows::
 The modifications cause the ``.so`` file to be the real library
 and unset :term:`FILES_SOLIBSDEV` so that no libraries get packaged into
 ``${PN}-dev``. The changes are required because unless :term:`PACKAGES` is changed,
-``${PN}-dev`` collects files before `${PN}`. ``${PN}-dev`` must not collect any of
+``${PN}-dev`` collects files before ``${PN}``. ``${PN}-dev`` must not collect any of
 the files you want in ``${PN}``.
 
 Finally, loadable modules, essentially unversioned libraries that are linked