README.Git: Update required Texinfo version

It seems that older makeinfo does not correctly generate the docbook format.  Thanks to
Harry for finding this.

diff --git a/README.Git b/README.Git
index c314e73f423a220e11e3dea0fe87b9e1ff4f9897..8333600457eba7e3b99a3be97e16a1b302e1f03d 100644 (file)
--- a/README.Git
+++ b/README.Git
@@ -21,7 +21,7 @@ following:
 
        * libtool 1.5.22 (or later).
 
-       * Texinfo 4.7 or later, to build the documentation.
+       * Texinfo 5.2 or later, to build the documentation.
 
        * Gimp --  2.8.2 is known to work