Change directory for plugins as well


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8658 a1c6a512-1295-4272-9138-f99709370657
diff --git a/manual/rockbox.tex b/manual/rockbox.tex
index 8f3b654..941b5ab 100644
--- a/manual/rockbox.tex
+++ b/manual/rockbox.tex
@@ -16,7 +16,7 @@
 \input{rockbox_interface/main.tex}
 \input{main_menu/main.tex}
 \input{configure_rockbox/main.tex}
-\input{chapter5/plugins.tex}
+\input{plugins/main.tex}
 \input{advanced_topics/main.tex}
 %\input{appendix.tex}
 %\appendix