Article: https://wordpress.org/documentation/article/image-block/

Update for 6.8

• Block Editor: Add notice action to revert image to original after cropping #67314
• Block Editor: Add success notices for image editing #67312
• Added toolbar dropdown action to set any image as feature image #65896
• Change how the Image's overlay styles are applied #67788

General

• Make sure all screenshots are relevant to the latest version
• Make sure videos, if any, are up to date
• Add ALT tags for the images
• Make sure the headings are in sentence case
• Convert all reusable blocks to a ‘regular block’.
• Update the changelog at the end of the article

Notes

1. We are not adding detailed updates for the Block settings - Typography, Color, Layout, Dimension and Border and for the More Options setting in the block toolbar. Pls mention the settings included for the block and link to the detailed settings pages instead.
2. Some of the PRs have great videos that can be added to the article.