OWNERS: Add Sivaprabu Ganesan as Reviewer

Sivaprabu is working on webui-vue, been active in moving in Vue3 and
expressed interest in being a Reviewer.

Change-Id: I0b9d5404a8b88049aac52edbb76f8c2de920bd3e
Signed-off-by: Kiran Kumar <kirankumarb@ami.com>

OWNERS

@@ -38,6 +38,7 @@ owners:
 reviewers:
 - a.nikhil@ibm.com
 - Renuka.Sharanya.Pundla@ibm.com
+- sivaprabug@ami.com
 
 matchers:
 
@@ -54,3 +55,6 @@ openbmc:
 - name: Renuka Sharanya Pundla
   email: Renuka.Sharanya.Pundla@ibm.com
   discord: Renuka Sharanya
+- name: Sivaprabu Ganesan
+  email: sivaprabug@ami.com
+  discord: sivaprabug