Maintainers.txt: Update maintainer of MdeModulePkg

Add Jian J Wang <jian.j.wang@intel.com> and
remove Eric Dong <eric.dong@intel.com>.
Eric is focusing on UefiCpuPkg.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
diff --git a/Maintainers.txt b/Maintainers.txt
index df7dc48..61df6e1 100644
--- a/Maintainers.txt
+++ b/Maintainers.txt
@@ -172,7 +172,7 @@
 MdeModulePkg

 W: https://github.com/tianocore/tianocore.github.io/wiki/MdeModulePkg

 M: Star Zeng <star.zeng@intel.com>

-M: Eric Dong <eric.dong@intel.com>

+M: Jian J Wang <jian.j.wang@intel.com>

 M: NetworkPkg maintainers

   (Universal/Network and related libraries, header files)

 R: Ruiyu Ni <ruiyu.ni@intel.com>