Appoint Liu as Senlin PTL

Liu raised the late candidacy for Senlin PTL
2023.1 cycle.
- https://review.opendev.org/c/openstack/election/+/855059
- https://etherpad.opendev.org/p/2023.1-leaderless

Change-Id: Ifdbfb786868553b34378c90ec34f68c1a3ba4196

reference/projects.yaml

@@ -2523,13 +2523,14 @@ sahara:
         - openstack/sahara-specs
 senlin:
   ptl:
-    name: APPOINTMENT NEEDED
+    name: XueFeng Liu
     irc: No nick supplied
-    email: example@example.org
+    email: liu.xuefeng1@zte.com.cn
   appointed:
     - wallaby
     - xena
     - zed
+    - 2023.1
   irc-channel: senlin
   service: Clustering service
   mission: >