[css-align-3] Default safety of scroll containers

[chromium-helper]

CSSWG added the following resolution(s):

• RESOLVED: all scroll containers default to unsafe alignment (not actually unsafe on scroll container)

in w3c/csswg-drafts#10008 (comment)

[chromium-helper]

I have filed issues.chromium.org/331623253

That is all that can be done here, closing issue.