[gtk-osx] Fix docbook download URI.

[John Ralls <jralls src gnome org>]

commit c095f80d219ee058df8a060a959e03e4e63e9b32
Author: John Ralls <jralls ceridwen us>
Date:   Sat Sep 16 03:37:33 2017 -0700

    Fix docbook download URI.

 modulesets-stable/bootstrap.modules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modulesets-stable/bootstrap.modules b/modulesets-stable/bootstrap.modules
index 76f093e..c49962e 100644
--- a/modulesets-stable/bootstrap.modules
+++ b/modulesets-stable/bootstrap.modules
@@ -195,7 +195,7 @@
   -->
   <autotools id="gtk-osx-docbook" autogen-sh="configure"
              supports-non-srcdir-builds="no" >
-    <branch repo="sourceforge" module="gtk-osx/gtk-osx-docbook-1.2.tar.bz"
+    <branch repo="sourceforge" module="gtk-osx/gtk-osx-docbook-1.2.tar.bz2"
             version="1.2"/>
   </autotools>