Broken and missing screenshots (mostly block pages)

[cgarofalo]

Issue Description

Several documentation pages have broken images or should be updated.

URL of the Page with the Issue

• Additional guide to using the Site Editor: The "How to customize your homepage" section could use screenshots for clarification.
• What is a Gravatar? : There's a missing / broken video.
• Cover Block : The images feature WordPress 6.3; maybe they should be updated to be more neutral.
• Embed Blocks : WordPress embed is listed twice here
• Amazon Kindle Embed : Broken images
• Facebook embed : Broken images
• WordPress Embed : Broken Images
• Pinterest Embed: The images feature WordPress 5.9; maybe they should be updated to be more neutral.
• Shortcode Block : Broken Images
• Comment Author Name Block : Broken Images
• Comment Content Block : Broken Images
• Comment Date Block : Broken Images
• Comment Edit Link block : Broken Images
• Comment Reply Link block : Broken Images
• Comment Template block : Broken Images
• Comments Pagination block : Broken Images
• Comments Title block : Broken Images
• Post Author block : Broken Images
• Post Comments Form Block : Broken Images
• Post Template Block : Broken Images
• Post List Block : Broken Images
• Read More Block : Broken Images
• Search Results Block : Broken Images

Why is this a problem?

There are missing images.

Suggested Fix

Create new screenshots for these pages that are missing screenshots.

[github-actions]

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