[mailmap] Update my name

Author: wangpc-pp

.mailmap

@@ -49,6 +49,6 @@ Ramkumar Ramachandra <r@artagnon.com> <artagnon@gmail.com>
 Ramkumar Ramachandra <r@artagnon.com> <Ramkumar.Ramachandra@imgtec.com>
 Saleem Abdulrasool <compnerd@compnerd.org>
 Tommy Chiang <ty1208chiang@gmail.com> <oToToT@users.noreply.github.com>
-Wang Pengcheng <wangpengcheng.pp@bytedance.com>
-Wang Pengcheng <wangpengcheng.pp@bytedance.com> <137158460+wangpc-pp@users.noreply.github.com>
-Wang Pengcheng <wangpengcheng.pp@bytedance.com> <pc.wang@linux.alibaba.com>
+Pengcheng Wang <wangpengcheng.pp@bytedance.com>
+Pengcheng Wang <wangpengcheng.pp@bytedance.com> <137158460+wangpc-pp@users.noreply.github.com>
+Pengcheng Wang <wangpengcheng.pp@bytedance.com> <pc.wang@linux.alibaba.com>