meta: revise .mailmap for README consistency

Update entry in .mailmap to reflect the same entry in README for an
existing collaborator.

PR-URL: #39457
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

Author: Trott

.mailmap

@@ -440,12 +440,12 @@ Wyatt Preul <wpreul@gmail.com>
 Xavier J Ortiz <xavier.ortiz.ch@gmail.com>
 xiaoyu <306766053@qq.com>
 Yael Hermon <yaelherm@gmail.com> <yaelhe@wix.com>
-Yazhong Liu <yorkiefixer@gmail.com>
-Yazhong Liu <yorkiefixer@gmail.com> <l900422@vip.qq.com>
 Yingchen Xue <yingchenxue@qq.com>
 Yongsheng Zhang <zyszys98@gmail.com>
 Yongsheng Zhang <zyszys98@gmail.com> <17367077526@163.com>
 Yongsheng Zhang <zyszys98@gmail.com> <zhangyongsheng@youzan.com>
+Yorkie Liu <yorkiefixer@gmail.com>
+Yorkie Liu <yorkiefixer@gmail.com> <l900422@vip.qq.com>
 Yoshihiro KIKUCHI <yknetg@gmail.com>
 Yosuke Furukawa <yosuke.furukawa@gmail.com> <furukawa.yosuke@dena.jp>
 Yuichiro MASUI <masui@masuidrive.jp>

AUTHORS

@@ -504,7 +504,7 @@ David Chan <david@sheetmusic.org.uk>
 Alexis Campailla <alexis@janeasystems.com>
 Nikolai Vavilov <vvnicholas@gmail.com>
 Michael Ridgway <mcridgway@gmail.com>
-Yazhong Liu <yorkiefixer@gmail.com>
+Yorkie Liu <yorkiefixer@gmail.com>
 Gabriel Falkenberg <gabriel.falkenberg@gmail.com>
 Kai Groner <kai@gronr.com>
 Lalit Kapoor <lalitkapoor@gmail.com>