fix: upgrade @testing-library/jest-dom from 6.0.0 to 6.4.8

Snyk has created this PR to upgrade @testing-library/jest-dom from 6.0.0 to 6.4.8.

See this package in npm:
@testing-library/jest-dom

See this project in Snyk:
https://app.snyk.io/org/zntb/project/be576617-3b31-4979-bdde-f06ac2d04b83?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot