chore: steps

Author: TkDodo

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

@@ -224,11 +224,11 @@ const route = createRoute({
 })
 ```
 
-## Step 3: Avoid Ad Blockers With Tunneling (Optional)
+## Step 4: Avoid Ad Blockers With Tunneling (Optional)
 
 <PlatformContent includePath="getting-started-tunneling" />
 
-## Step 4: Verify
+## Step 5: Verify
 
 Let's test your setup and confirm that Sentry is working correctly and sending data to your Sentry project.