fix(swatch): adjust s2 corner rounding #11335

Job	Run time
Capture changed-files	4s
Testing / Chromatic	5m 35s
Publish / Publish	5m 28s
Compare / Fetch & validate build artifacts (rise-erpelding/css-1100-s2-xs-swatch-rounding)	3m 36s
Compare / Fetch & validate build artifacts (main)	3m 37s
Verify (macos-latest, 20) / Build (macos-latest, 20, false)	3m 2s
Verify (ubuntu-latest, 20) / Build (ubuntu-latest, 20, false)	3m 29s
Plugin tests	0s
Lint / Lint	3m 38s
Compare / Compare compiled assets	1m 4s
	29m 33s

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