Add back check for GroupContext in ActionList.Selection to fix issues…

… introduced to github/github (#3267)

* Add back check for groupContext in ActionList Selection component.

* Update src/ActionList/Selection.tsx

Co-authored-by: Josh Black <joshblack@github.com>

* chore: run format

* Linting.

---------

Co-authored-by: Josh Black <joshblack@github.com>
Co-authored-by: Josh Black <joshblack@users.noreply.github.com>

src/ActionList/Selection.tsx

@@ -1,16 +1,18 @@
 import React from 'react'
 import {CheckIcon} from '@primer/octicons-react'
-import {ListContext, ActionListProps} from './List'
+import {ListContext} from './List'
 import {ActionListItemProps} from './shared'
 import {LeadingVisualContainer} from './Visuals'
+import {GroupContext} from './Group'
 
 type SelectionProps = Pick<ActionListItemProps, 'selected'>
 export const Selection: React.FC<React.PropsWithChildren<SelectionProps>> = ({selected}) => {
+  const {selectionVariant: groupSelectionVariant} = React.useContext(GroupContext)
   const {selectionVariant: listSelectionVariant} = React.useContext(ListContext)
 
   /** selectionVariant in Group can override the selectionVariant in List root */
   /** fallback to selectionVariant from container menu if any (ActionMenu, SelectPanel ) */
-  const selectionVariant: ActionListProps['selectionVariant'] = listSelectionVariant
+  const selectionVariant = groupSelectionVariant ?? listSelectionVariant
 
   if (!selectionVariant) {
     // if selectionVariant is not set on List, but Item is selected