test(Playwright, JEST): update actions node version

[krsiakdaniel]

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[krsiakdaniel]

This pull request updates the GitHub Actions workflows for Jest and Playwright to use the latest versions of actions and Node.js. The most important changes include updating the versions of actions/checkout, actions/setup-node, and actions/upload-artifact, as well as changing the Node.js version from 18 to 20.

Updates to GitHub Actions workflows:

• .github/workflows/jest.yml: Updated actions/checkout to version 4, actions/setup-node to version 4, and actions/upload-artifact to version 4. Changed Node.js version from 18 to 20.
• .github/workflows/playwright.yml: Updated actions/checkout to version 4, actions/setup-node to version 4, and actions/upload-artifact to version 4. Changed Node.js version from 18 to 20.