@box/box-ui-elements v21.0.0 release note (#393)

* @box/box-ui-elements v21.0.0 release note

* fix linter

---------

Co-authored-by: Barbara Czyz <[email protected]>

.spelling

@@ -294,4 +294,6 @@ docgen
 js
 upsell
 oauths
-
+hapi
+webpack
+droppable

content/2024/07-16-box-ui-elements-v2100-released.md

@@ -0,0 +1,87 @@
+---
+applied_at: '2024-07-16'
+applies_to:
+  - frontend
+  - ui-elements
+is_impactful: true
+is_new_feature: true
+release_source_url: 'https://github.com/box/box-ui-elements/releases/tag/v21.0.0'
+collapse: true
+---
+
+# Box UI Elements `v21.0.0` released
+
+# [21.0.0][1] (2024-07-16)
+
+### Bug Fixes
+
+* upgrade hapi address package dependency ([#3579][2]) ([`b089619`][3])
+* upgrade react-virtualized peer dependency ([#3578][4]) ([`3ebae37`][5])
+* **avatars:** Add type to Fetch avatar ([#3560][6]) ([`14a194f`][7])
+* **content-sidebar:** update to sidebar icon styles ([#3561][8]) ([`381a3b6`][9])
+* **content-uploader:** fix multiple items droppable issue ([#3565][10]) ([`87815de`][11])
+* **i18n:** update translations ([#3563][12]) ([`6d9c65f`][13])
+* **i18n:** update translations ([#3564][14]) ([`7988af8`][15])
+* **i18n:** update translations ([#3566][16]) ([`3103983`][17])
+* **preview:** Update preview error messages ([#3562][18]) ([`aff6217`][19])
+
+### Features
+
+* **docgen:** add docgen icon ([#3573][20]) ([`f5d4955`][21])
+* **react:** BREAKING CHANGE Upgrade to React 18 ([#3556][22]) ([`91e0978`][23])
+* **webpack:** BREAKING CHANGE Upgrade to webpack 5 and `react-styleguidist` 12.0.1 ([#3568][24]) ([`a812294`][25])
+
+### BREAKING CHANGES
+
+* upgrade hapi/address to resolve undefined buffer reference
+* upgrade peer dependency for react-virtualized to support react 18
+
+[1]: https://github.com/box/box-ui-elements/compare/v20.0.0...v21.0.0
+
+[2]: https://github.com/box/box-ui-elements/issues/3579
+
+[3]: https://github.com/box/box-ui-elements/commit/b0896194b79263ab60b47363abfbb98258244a47
+
+[4]: https://github.com/box/box-ui-elements/issues/3578
+
+[5]: https://github.com/box/box-ui-elements/commit/3ebae376521ab8a4232005bae32e81c2b82da903
+
+[6]: https://github.com/box/box-ui-elements/issues/3560
+
+[7]: https://github.com/box/box-ui-elements/commit/14a194f449018932134cc5df741ecd36c774a321
+
+[8]: https://github.com/box/box-ui-elements/issues/3561
+
+[9]: https://github.com/box/box-ui-elements/commit/381a3b642b0148553c6f65cea159b0718271117a
+
+[10]: https://github.com/box/box-ui-elements/issues/3565
+
+[11]: https://github.com/box/box-ui-elements/commit/87815de94e8fb607f24a0e17750ffbaa2e713125
+
+[12]: https://github.com/box/box-ui-elements/issues/3563
+
+[13]: https://github.com/box/box-ui-elements/commit/6d9c65f0054d329a20a65ef814b9c0e867c9baf7
+
+[14]: https://github.com/box/box-ui-elements/issues/3564
+
+[15]: https://github.com/box/box-ui-elements/commit/7988af8eb56a8e6e5abf8bb07d53f3250b148cf5
+
+[16]: https://github.com/box/box-ui-elements/issues/3566
+
+[17]: https://github.com/box/box-ui-elements/commit/310398302abd67bb48dbf5317dc858f054b0cc16
+
+[18]: https://github.com/box/box-ui-elements/issues/3562
+
+[19]: https://github.com/box/box-ui-elements/commit/aff6217671d25015d314813295b871facfb8a9cc
+
+[20]: https://github.com/box/box-ui-elements/issues/3573
+
+[21]: https://github.com/box/box-ui-elements/commit/f5d49554683c965335366ba0f7f34771cec4d4d4
+
+[22]: https://github.com/box/box-ui-elements/issues/3556
+
+[23]: https://github.com/box/box-ui-elements/commit/91e09787c545194ef61cb057e74df7dfd111728b
+
+[24]: https://github.com/box/box-ui-elements/issues/3568
+
+[25]: https://github.com/box/box-ui-elements/commit/a81229420c1a133145c9899efe908a080f59bd9f