Light theme text selection opacity more consistent with OS #14609

Job	Run time
Install node modules	35s
Zip and Upload files to Veracode	0s
Audit node modules	31s
Build website and playgrounds	3m 3s
Build and lint packages (ubuntu-latest)	1m 22s
Run visual tests (css)	8m 3s
Run unit tests	4m 6s
Build and lint packages (windows-latest)	3m 3s
Test for a11y violations	2m 34s
Run e2e tests	3m 2s
Run visual tests (react)	7m 56s
Push static files to github pages	2m 0s
	36m 15s

Provide feedback