Fix Color changes to be in sync with rest of the block for latest comment

[Anuj-Rathore24]

What?

This PR solves the following issues #66536, which address that latest comment text color doesn't change color in sync with the whole block

Why?

Refreshing the page after adding latest comments and changing its color doesn't change text color again, Then only first line text color will change, Remaining text color will not change.

How?

By setting the key prop and handling null values, we ensure the block behaves as expected.

Testing Instructions

• Select Latest comments block
• Change its background color & text color from block settings.
• Save the changes and publish the page.
• View the editor side & front-end side.
• Refresh the page.
• Now, change block text color & background color again.

Screenshots or screencast

Screen.Recording.2024-10-29.at.7.16.29.PM.mov

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: Anuj-Rathore24 <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[github-actions]

👋 Thanks for your first Pull Request and for helping build the future of Gutenberg and WordPress, @Anuj-Rathore24! In case you missed it, we'd love to have you join us in our Slack community.

If you want to learn more about WordPress development in general, check out the Core Handbook full of helpful information.

[t-hamano]

Thanks for the PR!

We need to fix the root cause of this problem, not the symptoms.
Probably we need to fix the ServerSideRender component itself. See #69220 for more details.

Let's close this PR and investigate the root cause.