fix: improve live region behavior for screen readers #5833

Job	Run time
Verify (packages/components)	3m 44s
Verify (packages/eslint-plugin)	50s
Verify (packages/theming)	51s
Verify (packages/tokens)	49s
Verify (packages/styles)	49s
Verify (packages/placeholders)	46s
Verify (packages/docs)	3m 48s
Verify Chromatic	0s
Verify (packages/docs)	3m 48s
Verify (packages/components)	3m 40s
Verify (packages/tokens)	49s
Verify (packages/styles)	49s
Verify (packages/eslint-plugin)	50s
Verify (packages/theming)	51s
Verify (packages/placeholders)	46s
Verify Chromatic	0s
	23m 10s

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