[ruby] Update release name to preview2, which is the most actual.

[Vít Ondruch]

commit 6951c61aeec302334258060fbfb268e3b02cdc72
Author: Vít Ondruch <vondruch at redhat.com>
Date:   Wed Dec 5 16:42:40 2012 +0100

    Update release name to preview2, which is the most actual.

 ruby.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/ruby.spec b/ruby.spec
index b6a6108..e4da346 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -12,7 +12,7 @@
 %global ruby_abi 1.9.1
 
 # Specify the named version. It has precedense to revision.
-#%%global milestone preview1
+#%%global milestone preview2
 
 # Keep the revision enabled for pre-releases from SVN.
 %global revision 38184