ConfirmModal: make button styling consistent (#67142)

* stop using fill="outline" for confirm modal dismiss button

* kick drone

packages/grafana-ui/src/components/ConfirmModal/ConfirmModal.tsx

@@ -97,7 +97,7 @@ export const ConfirmModal = ({
         ) : null}
       </div>
       <Modal.ButtonRow>
-        <Button variant={dismissVariant} onClick={onDismiss} fill="outline">
+        <Button variant={dismissVariant} onClick={onDismiss}>
           {dismissText}
         </Button>
         <Button