[skip ci]Fix create collection design doc typo (#9699)

Signed-off-by: Ntumao <yan.wang@zilliz.com>

docs/design_docs/milvus_create_collection_en.md

@@ -40,7 +40,7 @@ message CollectionSchema {
 
 ```
 
-1. When received the `CreateCollection` request, the `Proxy` would wrap this request into `CreateCollectionTask`, and pushes this task into `DdTaskQueue` queue. After that, `Proxy` would call method of `WatiToFinish`  to wait until the task is finished.
+1. When received the `CreateCollection` request, the `Proxy` would wrap this request into `CreateCollectionTask`, and pushes this task into `DdTaskQueue` queue. After that, `Proxy` would call `WaitToFinish` method to wait until the task is finished.
 ```go
 type task interface {
 	TraceCtx() context.Context