update issue 7

Author: fantasai

css3-namespace/issues-2.txt

@@ -48,6 +48,6 @@ Issue 7.
 Summary:  Add example of non-matching prefixes denoting the same expanded name
 From:     Erik Dahlstrom, on behalf of SVGWG
 Comment:  http://lists.w3.org/Archives/Public/www-style/2008Mar/0132.html
-Response: 
+Response: http://lists.w3.org/Archives/Public/www-style/2008Mar/0142.html
 Closed:   Accepted
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