[SecuritySolution][Alert Details] - fix missing key console log error (…

…elastic#196201)

(cherry picked from commit 3028205)

x-pack/plugins/security_solution/public/flyout/document_details/right/header.tsx

@@ -64,6 +64,7 @@ export const PanelHeader: FC<PanelHeaderProps> = memo(
           isTourAnchor={isAlert}
           step={AlertsCasesTourSteps.reviewAlertDetailsFlyout}
           tourId={SecurityStepId.alertsCases}
+          key={index}
         >
           <EuiTab
             onClick={() => onSelectedTabChanged(tab.id)}