Fix auxiliaryText in ActionList/Header.tsx (#1549)

* FIx auxiliaryText in ActionList Header.tsx

the auxiliaryText property are not displayed due to missing curly braces

* Create quick-ducks-camp.md

Co-authored-by: Siddharth Kshetrapal <[email protected]>

Author: michael-lefebvre

.changeset/quick-ducks-camp.md

@@ -0,0 +1,5 @@
+---
+"@primer/components": patch
+---
+
+Fix `auxiliaryText` in ActionList Group header

src/ActionList/Header.tsx

@@ -68,7 +68,7 @@ export function Header({
   return (
     <StyledHeader role="heading" variant={variant} {...props}>
       {title}
-      {auxiliaryText && <span>auxiliaryText</span>}
+      {auxiliaryText && <span>{auxiliaryText}</span>}
     </StyledHeader>
   )
 }