Update the repo url of pyupgrade pre-commit hook (#756)

Author: BayMaxBHL

.pre-commit-config-zh-cn.yaml

@@ -43,7 +43,7 @@ repos:
     hooks:
       - id: docformatter
         args: ["--in-place", "--wrap-descriptions", "79"]
-  - repo: https://github.com/asottile/pyupgrade
+  - repo: https://gitee.com/openmmlab/mirrors-pyupgrade
     rev: v3.0.0
     hooks:
       - id: pyupgrade