chore(ButtonGroup): Move ButtonGroup css module feature flag to staff (#5144)

* Move ButtonGroup css module feature flag to staff

* Create thirty-worms-accept.md

Author: jonrohan

.changeset/thirty-worms-accept.md

@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+Move ButtonGroup css module feature flag to staff

packages/react/src/ButtonGroup/ButtonGroup.tsx

@@ -9,7 +9,7 @@ import {clsx} from 'clsx'
 import {useFeatureFlag} from '../FeatureFlags'
 
 const StyledButtonGroup = toggleStyledComponent(
-  'primer_react_css_modules_team',
+  'primer_react_css_modules_staff',
   'div',
   styled.div`
     display: inline-flex;
@@ -78,7 +78,7 @@ const ButtonGroup = React.forwardRef<HTMLElement, ButtonGroupProps>(function But
   {children, className, ...rest},
   forwardRef,
 ) {
-  const enabled = useFeatureFlag('primer_react_css_modules_team')
+  const enabled = useFeatureFlag('primer_react_css_modules_staff')
   return (
     <StyledButtonGroup
       ref={forwardRef}