Release notes for S2 v0.4.0 (#7099)

Author: devongovett

.storybook-s2/docs/Release Notes.mdx

@@ -4,6 +4,35 @@ export default MDXLayout;
 
 # Release Notes
 
+## v0.4.0
+
+### New components
+
+* [Accordion](?path=/docs/accordion--docs)
+* [Disclosure](?path=/docs/disclosure--docs)
+* [Card](?path=/docs/card--docs)
+* [CardView](?path=/docs/cardview--docs)
+* [SegmentedControl](?path=/docs/segmentedcontrol--docs)
+* [Table](?path=/docs/table--docs)
+
+### Updates
+
+* [ProgressBar](?path=/docs/progressbar--docs): Support side label, update edges to be rounded, and support custom widths
+* [ProgressCircle]((?path=/docs/progresscircle--docs)): Update edges to be rounded
+* [Badge](?path=/docs/badge--docs): Add subtle and outline fill variants
+* [Breadcrumbs](?path=/docs/breadcrumbs--docs): Add collapse behavior
+* [Button](?path=/docs/button--docs): Add support for pending state
+* Update Spectrum Tokens to v46
+
+### Codemods
+
+* Handle legacy Link API
+* Remove Section and Items imports if not used elsewhere in file
+* Support Badge
+* Support Well
+* Support icons
+* Fix links and install step
+
 ## v0.3.0
 
 <Release030Intro />