docs(js): Add diffs to react router build config (#13098)

Author: chargome

docs/platforms/javascript/guides/react-router/index.mdx

@@ -209,7 +209,7 @@ Update `vite.config.ts` to include the `sentryReactRouter` plugin. Also add your
 
 <OrgAuthTokenNote />
 
-```typescript {filename: vite.config.ts}
+```typescript {filename: vite.config.ts} {diff}
 import { reactRouter } from '@react-router/dev/vite';
 import { sentryReactRouter, type SentryReactRouterBuildOptions } from '@sentry/react-router';
 import { defineConfig } from 'vite';
@@ -225,15 +225,15 @@ const sentryConfig: SentryReactRouterBuildOptions = {
 
 export default defineConfig(config => {
   return {
-    plugins: [reactRouter(), sentryReactRouter(sentryConfig, config)],
-    sentryConfig,
++   plugins: [reactRouter(),sentryReactRouter(sentryConfig, config)],
++   sentryConfig, // Also pass the config here!
   };
 });
 ```
 
 Include the `sentryOnBuildEnd` hook in `react-router.config.ts`:
 
-```typescript {filename: react-router.config.ts} {9}
+```typescript {filename: react-router.config.ts} {diff}
 import type { Config } from '@react-router/dev/config';
 import { sentryOnBuildEnd } from '@sentry/react-router';
 
@@ -242,7 +242,7 @@ export default {
   buildEnd: async ({ viteConfig, reactRouterConfig, buildManifest }) => {
     // ...
     // Call this at the end of the hook
-    await sentryOnBuildEnd({ viteConfig, reactRouterConfig, buildManifest });
++   await sentryOnBuildEnd({ viteConfig, reactRouterConfig, buildManifest });
   },
 } satisfies Config;
 ```