Simplify sprintf translation for percentage widths

[im3dabasia]

Related comment: #68270 (comment)
Related issues: #52787 , #66323 (review)

What?

This PR refines the code quality by simplifying the translation of percentage widths.

Why?

The previous implementation used __( '%1$d%%' ) due to an ESLint error being flagged when using the simpler __( '%d%%' ). Now that the sprintf regex has been updated, this simplification is possible without causing issues. The change ensures consistency across the codebase and improves readability.

How?

Replaced __( '%1$d%%' ) with __( '%d%%' ) for percentage translations.

[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: im3dabasia <[email protected]>
Co-authored-by: t-hamano <[email protected]>
Co-authored-by: Mamaduka <[email protected]>

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

[im3dabasia]

Hey @t-hamano ,

When you have a moment, could you please review my PR? I'd appreciate your feedback.

I’m not sure why the linting checks for JavaScript are failing. The changes I made didn’t raise any linting errors during development.

[Mamaduka]

@im3dabasia, rebasing should fix the failing Static Analysis check.

[t-hamano]

LGTM! Nice follow-up 👍