April release notes (#6247)

* initialize release notes

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Co-authored-by: Danni <darobins@adobe.com>
Co-authored-by: Devon Govett <devongovett@gmail.com>

Author: 3 people

packages/dev/docs/pages/releases/2023-12-20.mdx

@@ -26,7 +26,7 @@ As always, huge thanks to everyone in our community for their feedback and contr
 Happy coding and see you in the new year! ☃️
 
 
-### React Aria Components API updates
+**React Aria Components API updates**
 
 In this release, we made a few last API updates to React Aria Components as they move along to GA.