Improve the example that illustrates git-notes path names

The new example makes it clear that the leaf name has only the rest of the object ID, and
not the entire object ID.

Signed-off-by: Noam Yorav-Raphael <[email protected]>

Author: noamraph

Documentation/git-notes.txt

@@ -223,7 +223,7 @@ are taken from notes refs.  A notes ref is usually a branch which
 contains "files" whose paths are the object names for the objects
 they describe, with some directory separators included for performance
 reasons footnote:[Permitted pathnames have the form
-'ab'`/`'cd'`/`'ef'`/`'...'`/`'abcdef...': a sequence of directory
+'12'`/`'34'`/`'56'`/`'...'`/`'789abc...': a sequence of directory
 names of two hexadecimal digits each followed by a filename with the
 rest of the object ID.].