Corrected that annoying typo of How Work These Scripts

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@4130 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter07/usage.xml

@@ -4,7 +4,7 @@
   %general-entities;
 ]>
 <sect1 id="ch-scripts-usage">
-<title>How work these bootscripts?</title>
+<title>How do these bootscripts work?</title>
 <?dbhtml filename="usage.html"?>
 
 <indexterm zone="ch-scripts-usage">