update assignement (#12750)

Author: yungezz

.github/pull_request_assignment.yml

@@ -184,7 +184,6 @@
     paths:
       - "**"
     reviewers:
-      - yungezz
       - erich-wang
       - PhoenixHe-msft
       - lirenhe
@@ -193,7 +192,6 @@
       - xccc-msft
       - raych1
       - ChenTanyi
-      - fengzhou-msft
       - njuCZ
       - akning-ms
       - leni-msft