Merge pull request #575 from syslxg/patch-2

Add Gary Liu in Volume Service

Author: pivotal-marcela-campo

toc/working-groups/service-management.md

@@ -105,6 +105,8 @@ areas:
     github: ifindlay-cci
   - name: Konstantin Kiess
     github: nouseforaname
+  - name: Gary Liu
+    github: syslxg
   bots:
   - name: Cryogenics CI Bot
     github: Cryogenics-CI