misc: fix mail in maintainers.md
@@ -14,7 +14,7 @@ Name | Email | Focus
----|---|---
[Siddon Tang](https://github.com/siddontang) | [tl@pingcap.com](mailto:tl@pingcap.com) | Project Lead
[Jay Li](https://github.com/busyjay) | [jay@pingcap.com](mailto:jay@pingcap.com) | Raft, Coprocessor
-[Jinpeng Zhang](https://github.com/zhangjinpeng1987) | [zhangjinpeng@pingcap.com](mailto:jay@pingcap.com) | Storage, Transaction
+[Jinpeng Zhang](https://github.com/zhangjinpeng1987) | [zhangjinpeng@pingcap.com](mailto:zhangjinpeng@pingcap.com) | Storage, Transaction
# Maintainers
