Downgrade mysql version to 8.0.23 (#351)

Signed-off-by: Edward Zeng <jie.zeng@zilliz.com>

Author: LoveEachDay

charts/milvus/Chart.yaml

@@ -3,7 +3,7 @@ name: milvus
 appVersion: "2.1.0"
 kubeVersion: "^1.10.0-0"
 description: Milvus is an open-source vector database built to power AI applications and vector similarity search.
-version: 3.1.1
+version: 3.1.2
 keywords:
   - milvus
   - elastic

charts/milvus/charts/mysql-8.5.3.tgz

@@ -12,7 +12,7 @@ dependencies:
   repository: https://charts.bitnami.com/bitnami
   version: 15.5.1
 - name: mysql
-  repository: https://charts.bitnami.com/bitnami
-  version: 9.2.1
-digest: sha256:fd5ff3b07045b17d7a4401b387226390d2836a95c42697d79143227e476bc5ad
-generated: "2022-07-25T13:05:42.713297+08:00"
+  repository: https://raw.githubusercontent.com/bitnami/charts/pre-2022/bitnami
+  version: 8.5.3
+digest: sha256:724eda0aab72cf7e7dd421af1d70d5eb8e25822703c31b303c7f75c15631e296
+generated: "2022-07-25T19:04:23.469903+08:00"

charts/milvus/charts/mysql-9.2.1.tgz

@@ -24,8 +24,8 @@ dependencies:
   tags:
     - kafka
 - name: mysql
-  version: 9.2.1
-  repository: https://charts.bitnami.com/bitnami
+  version: 8.5.3
+  repository: https://raw.githubusercontent.com/bitnami/charts/pre-2022/bitnami
   condition: mysql.enabled
   tags:
     - mysql