[css-images-3]Updated issues-cr-2012.yaml

Author: tabatkins

css-images-3/issues-cr-2012.yaml

@@ -681,6 +681,7 @@ issue:
     from: zcorpan
     comment:
       - 'https://github.com/w3c/csswg-drafts/issues/3799'
+      - 'https://github.com/w3c/csswg-drafts/issues/3799#issuecomment-484421901'
     response:
       - (none yet)
     tag: []