chore: Fix comment

packages/job-queue-plugin/src/index.ts

@@ -1,4 +1,4 @@
 /**
- * This is a placeholder. Please import from one of the sub-packages, e.g `@vendure/job-queue-plugin/pub-sub`
+ * This is a placeholder. Please import from one of the sub-packages, e.g `@vendure/job-queue-plugin/package/bullmq`
  */
 export const placeholder = 'Vendure Job Queue Plugin';