fix: update Contrast > State changes exception text

[cutePanda123]

Description of changes

Update Contrast > State changes exception text to address issue #3806

Pull request checklist

• Addresses an existing issue: Minor text changes in Contrast > UI components and Contrast > State changes #3806
• Ran yarn fastpass
• Added/updated relevant unit test(s) (and ran yarn test)
• Verified code coverage for the changes made. Check coverage report at: <rootDir>/test-results/unit/coverage
• PR title AND final merge commit title both start with a semantic tag (fix:, chore:, feat(feature-name):, refactor:). See CONTRIBUTING.md.
• (UI changes only) Added screenshots/GIFs to description above
• (UI changes only) Verified usability with NVDA/JAWS

screenshot:

[peterdur]

Looks good! Thanks for taking care this second case. We didn't recognize you with your new username!