Article: https://wordpress.org/documentation/article/styles-overview/

Update for 6.3

• Global styles revisions: move from experimental to 6.3 51474
• add revisions UI 50089
• Unify the global block styles panel with the block inspector panels 49428
• Link to the block type panel when selecting a block with Styles open 49350
• Caption element UI controls for color and typography 49141
• Remove copy for managing a block's style variations 48367
• Add example so that it will display in style book 48300
• Allow button text labels for style book icon 48088
• Update 'Additional CSS' subtitle string 47671
• move shadow into own panel 47634
• Add Global Styles controls for blocks that support duotone 48255

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.