fix(Progressbar): set new aria attributes for percentages

[LinKCoding]

Overview

PR Checklist

• Related to designs:
• Related to JIRA ticket: [ABC-123]
• I have run this code to verify it works
• This PR includes unit tests for the code change
• This PR includes testing instructions tests for the code change
• The alpha package of this PR is passing end-to-end tests in all relevant Codecademy repositories

Testing Instructions

Don't make me tap the sign.

PR Links and Envs

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Portal	Portal Link	Portal Env
Another Repo	Another Link	Another Env

[nx-cloud]

View your CI Pipeline Execution ↗ for commit eb6f14e.

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☁️ Nx Cloud last updated this comment at 2025-03-21 13:57:04 UTC

[codecademydev]

📬Published Alpha Packages:

@codecademy/gamut@59.3.1-alpha.eb6f14.0
@codecademy/gamut-kit@0.6.488-alpha.eb6f14.0

[codecademydev]

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