docs(theming): update CSS class-based theme deprecation from v4.0.0 to v5.0.0

[lakshmi-priya-b]

💡 What is the current behavior?

Documentation states CSS class-based theme configuration will be removed in version 4.0.0

GitHub Issue Number: #2326

🆕 What is the new behavior?

Documentation states CSS class-based theme configuration will be removed in version 5.0.0

👨‍💻 Help & support

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[gemini-code-assist]

Summary of Changes

Hello @lakshmi-priya-b, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the project's documentation to accurately reflect the revised deprecation schedule for CSS class-based theme configuration. The change ensures that users are informed about the correct version in which this theming approach will be removed, providing clarity and preventing potential confusion regarding future breaking changes.

Highlights

• Documentation Update: The documentation for CSS class-based theme configuration has been updated to reflect a change in its deprecation timeline.
• Deprecation Version Change: The planned removal of CSS class-based theme configuration has been moved from version 4.0.0 to version 5.0.0.

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[gemini-code-assist]

Code Review

This pull request correctly updates the deprecation version for CSS class-based theme configuration from v4.0.0 to v5.0.0 in the documentation. My review includes a suggestion to rephrase a sentence to adhere to the repository's style guide, specifically regarding the use of active voice.