[css-writing-modes-3] Fix issue # (issues-cr-2015)

Author: kojiishi

css-writing-modes-3/issues-cr-2015.bs-issues

@@ -66,6 +66,6 @@ Verified: https://lists.w3.org/Archives/Public/www-style/2016Dec/0042.html
 Issue 10.
 Summary:  Question about implementability of the "different writing-mode value than its containing block" section of the spec
 From:     Boris Zbarsky
-Comment:  https://github.com/w3c/csswg-drafts/issues/755
+Comment:  https://github.com/w3c/csswg-drafts/issues/1212
 Open:
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