chore: update changelog

Author: deployment_bot

CHANGELOG.md

@@ -4,6 +4,26 @@ All notable changes to this project are documented in this file by a CI job
 that runs on every NPM release. The file follows the [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 format.
 
+## [v3.0.21] (2025-11-10) 
+
+### Bug Fixes
+
+- Docs: Fix grammar, typos, and formatting issues across documentation. ([#2877](https://github.com/WordPress/wordpress-playground/pull/2877))
+- Docs: Fix typo in resources.md. ([#2876](https://github.com/WordPress/wordpress-playground/pull/2876))
+- docs: Fix MDN link for Access-Control-Allow-Origin header. ([#2875](https://github.com/WordPress/wordpress-playground/pull/2875))
+
+### Various
+
+- [Docs] Adding ask AI Button. ([#2858](https://github.com/WordPress/wordpress-playground/pull/2858))
+- [i18n] Add Japanese translations to Blueprints JSON and the API Client. ([#2873](https://github.com/WordPress/wordpress-playground/pull/2873))
+
+### Contributors
+
+The following contributors merged PRs in this release:
+
+@fellyph @hmbashar @huzaifaalmesbah @shimotmk
+
+
 ## [v3.0.20] (2025-11-06) 
 
 ### Enhancements

packages/docs/site/docs/main/changelog.md

@@ -9,6 +9,26 @@ All notable changes to this project are documented in this file by a CI job
 that runs on every NPM release. The file follows the [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 format.
 
+## [v3.0.21] (2025-11-10) 
+
+### Bug Fixes
+
+- Docs: Fix grammar, typos, and formatting issues across documentation. ([#2877](https://github.com/WordPress/wordpress-playground/pull/2877))
+- Docs: Fix typo in resources.md. ([#2876](https://github.com/WordPress/wordpress-playground/pull/2876))
+- docs: Fix MDN link for Access-Control-Allow-Origin header. ([#2875](https://github.com/WordPress/wordpress-playground/pull/2875))
+
+### Various
+
+- [Docs] Adding ask AI Button. ([#2858](https://github.com/WordPress/wordpress-playground/pull/2858))
+- [i18n] Add Japanese translations to Blueprints JSON and the API Client. ([#2873](https://github.com/WordPress/wordpress-playground/pull/2873))
+
+### Contributors
+
+The following contributors merged PRs in this release:
+
+@fellyph @hmbashar @huzaifaalmesbah @shimotmk
+
+
 ## [v3.0.20] (2025-11-06) 
 
 ### Enhancements