[HelpHub] Overhauling articles in the Customization subcategory - READ FIRST

[estelaris]

To update each article and update them to WP release 7.1, follow the instructions below:

• Review the reference issues and PRs that have been added to the article. Some articles may only have one issue.
• Make any valid updates from previous releases. If those updates are no longer relevant, close the the issue (NOTE: we can only close issues in the Documentation Issue Tracker, if you find a PR from the Gutenberg repository that can be closed, leave a message on it.)
• Make sure to follow the style guide for title, headers and tone.
• Do NOT hotlink images, take the screenshots and upload them to the documentation site in WordPress
• Update the Change log and add updater's WP.org username and any other contributors that have given feedback/solution even if it wasn't used (eg. updated by @estelaris @zzap)
• When you are done updating a block article, mark them in the list below

[github-actions]

Heads up @WordPress/docs-issues-coordinators, we have a new issue open. Time to use 'em labels.