updated rules of workflows with batch creation instructions

Author: bruxodasilva

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

@@ -449,3 +449,32 @@ export class MyWorkflow extends WorkflowEntrypoint {
 }
 ```
 </TypeScriptExample>
+
+### Batch multiple Workflow invocations
+
+When creating multiple Workflow instances, use the [`createBatch`](/workflows/build/workers-api/#createBatch) method to batch the invocations together. This allows you to create multiple Workflow instances in a single request, which will reduce the number of requests made to the Workflows API and increase the number of instances you can create per minute.
+
+<TypeScriptExample filename="index.ts">
+
+```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"}}];
+
+		// 🔴 Bad: Create them one by one, which is more likely to hit creation rate limits.
+		for (let instance of instances) {
+			await env.MY_WORKFLOW.create({
+				id: instance.id,
+				params: instance.params
+			});
+		}
+
+    // ✅ Good: Batch calls together
+    // This improves throughput.
+    let instances = await env.MY_WORKFLOW.createBatch(instances);
+    return Response.json({ instances })
+  },
+};
+```
+
+</TypeScriptExample>