chore(accordion): changeset formatting adjustment

Author: jawinn

.changeset/chatty-lands-attack.md

@@ -2,28 +2,28 @@
 "@spectrum-css/accordion": major
 ---
 
-#### Spectrum 2 migration
+### Spectrum 2 migration
 
 Accordion now uses Spectrum 2 tokens and specifications.
 
 New sized tokens are used for corner rounding, the spacing around the disclosure icon, and
 the spacing around the content area.
 
-##### New features
+#### New features
 
 - Adds the optional "quiet" style, which does not show dividers between accordion items.
 - Adds CSS transition to animate the rotation of the disclosure indicator when expanding and
   collapsing the accordion item.
 
-##### Markup changes
+#### Markup changes
 
 The HTML markup has changed slightly for the accordion header. The disclosure icon has been moved
 from outside the the button (`spectrum-Accordion-itemHeader`), to within the button. The extra
 element with class `spectrum-Accordion-itemIconContainer`, previously wrapping the icon, has
 been removed. A span with class `spectrum-Accordion-itemTitle` has been added around the heading
 text.
 
-###### Mod changes
+#### Mod changes
 
 The following `--mod` custom properties have been renamed to better reflect how they are used: