Update rules-of-workflows.mdx

use unique ids as suggested by previous rule

Author: grocco

src/content/docs/workflows/build/rules-of-workflows.mdx

@@ -459,7 +459,7 @@ When creating multiple Workflow instances, use the [`createBatch`](/workflows/bu
 ```ts
 export default {
   async fetch(req: Request, env: Env): Promise<Response> {
-		let instances = [{"id": "user1", "params": {"name": "John"}}, {"id": "user2", "params": {"name": "Jane"}}, {"id": "user3", "params": {"name": "Alice"}}, {"id": "user4", "params": {"name": "Bob"}}];
+		let instances = [{ id: "order-1001", params: { totalUsd: 29.99 }}, { id: "order-1002", params: { totalUsd: 9.49 }}];
 
 		// 🔴 Bad: Create them one by one, which is more likely to hit creation rate limits.
 		for (let instance of instances) {