The AWS Architecture Icons release notes summarize updates made to icons and diagrams. Key updates include:
1. Icons were updated to improve accessibility by increasing contrast ratios and text sizes. Gradients and elements were designed to work on light or dark backgrounds.
2. The color palette was aligned with AWS branding and new category colors were introduced.
3. The general icons library was expanded with additional resource icons.
4. Guidance was added for classroom projection use cases and labeling icon groups. Examples demonstrated updated icons for specific AWS services.