Rename ffprobe-doc.texi @chapter "Introduction" to "Description", for

consistency with the corresponding man section.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23453 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

doc/ffprobe-doc.texi

@@ -7,8 +7,7 @@
 @sp 3
 @end titlepage
 
-@chapter Introduction
-
+@chapter Description
 @c man begin DESCRIPTION
 
 FFprobe gathers information from multimedia streams and prints it in