change title of code block

Author: kodster28

src/content/docs/workers-ai/features/batch-api/get-started.mdx

@@ -75,7 +75,7 @@ Ensure that the total payload is under 10 MB.
 
 :::
 
-```typescript title="src/index.js" {28}
+```typescript title="src/index.ts" {28}
 interface AIRequest {
 	prompt: string;
 	temperature: number;