Bump chart version (#436)

Signed-off-by: Bennu-Li <yunmei.li@zilliz.com>

Author: Bennu-Li

charts/milvus/Chart.yaml

@@ -3,7 +3,7 @@ name: milvus
 appVersion: "2.2.6"
 kubeVersion: "^1.10.0-0"
 description: Milvus is an open-source vector database built to power AI applications and vector similarity search.
-version: 4.0.15
+version: 4.0.16
 keywords:
   - milvus
   - elastic