[Guided onboarding] fix: fixes shadow on Continue using Elastic button (#158610)

src/plugins/guided_onboarding/public/components/guide_panel_flyout/guide_panel_flyout_body.tsx

@@ -156,6 +156,8 @@ export const GuidePanelFlyoutBody = ({
             </EuiButton>
           </EuiFlexItem>
         </EuiFlexGroup>
+
+        <EuiSpacer />
       </>
     );
   }