docs(expo-router): fix import order and formatting

Author: moritzlang

docs/platforms/react-native/tracing/instrumentation/expo-router.mdx

@@ -12,8 +12,8 @@ The code snippet below shows how to initialize the instrumentation.
 
 ```javascript {6-8, 15-16, 20-25} {filename: app/_layout.tsx}
 import React from 'react';
+import { isRunningInExpoGo } from 'expo';
 import { Slot, useNavigationContainerRef } from 'expo-router';
-import { isRunningInExpoGo } from "expo"
 import * as Sentry from '@sentry/react-native';
 
 const navigationIntegration = Sentry.reactNavigationIntegration({