Update CHANGELOG.md for v8.2.3 [skip ci]

CHANGELOG.md

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+## 8.2.3
+
+- Bug: Fix invalid docs links in Configure.mdx template page - [#28560](https://github.com/storybookjs/storybook/pull/28560), thanks @kylegach!
+- CLI: Add "missing-storybook-dependencies" automigration - [#28579](https://github.com/storybookjs/storybook/pull/28579), thanks @yannbf!
+- CPC: Add `theming/create` aliases in docs preset - [#28570](https://github.com/storybookjs/storybook/pull/28570), thanks @ndelangen!
+- CPC: Fix incorrect re-export in `core-events` - [#28573](https://github.com/storybookjs/storybook/pull/28573), thanks @ndelangen!
+- CPC: Fix Vite builder had wrong conditions - [#28581](https://github.com/storybookjs/storybook/pull/28581), thanks @ndelangen!
+- CSF: Fix small typing issue - [#28587](https://github.com/storybookjs/storybook/pull/28587), thanks @valentinpalkovic!
+- Portable stories: Remove unused types - [#28548](https://github.com/storybookjs/storybook/pull/28548), thanks @kasperpeulen!
+- Webpack: Fix sourceMap generation in csf-tools - [#28585](https://github.com/storybookjs/storybook/pull/28585), thanks @valentinpalkovic!
+
 ## 8.2.2
 
 - CPC: Add `ESM` export to `docs-tools` & `node-logger` packages - [#28539](https://github.com/storybookjs/storybook/pull/28539), thanks @ndelangen!