[releng] block_retired: Update comment

[Till Maas]

commit 75c1469f33dfdcbcd069b24a6cd63c2783c5caea
Author: Till Maas <opensource at till.name>
Date:   Tue Feb 10 23:20:36 2015 +0100

    block_retired: Update comment

 scripts/block_retired.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/scripts/block_retired.py b/scripts/block_retired.py
index ff4f5e6..0fb5000 100755
--- a/scripts/block_retired.py
+++ b/scripts/block_retired.py
@@ -33,7 +33,7 @@ class ReleaseMapper(object):
 
     def __init__(self, staging=False):
 
-        # git branchname, koji tag, pkgdb version
+        # git branchname, koji tag, epel build tag
         self.mapping = (
             ("master", "f23", ""),
             ("f22", "f22", ""),