Add Sandeepa Singh as Maintainer

Sandeepa has made many contributions to webui-vue.
https://gerrit.openbmc.org/q/owner:sandeepa.singh%2540ibm.com+status:merged

If others are interested in maintaining or being a reviewer and feel
they have the experience please push a commit.

Change-Id: I2a31b33d79aae3d9fc43d37756ee16d115df7f7c
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/OWNERS b/OWNERS
index 98bfe9a..ea66994 100644
--- a/OWNERS
+++ b/OWNERS
@@ -34,6 +34,7 @@
 owners:
 - dixsie@ibm.com
 - gmills@linux.vnet.ibm.com
+- sandeepa.singh@ibm.com
 
 reviewers:
 
@@ -46,3 +47,6 @@
 - name: Gunnar Mills
   email: gmills@linux.vnet.ibm.com
   discord: GunnarM
+- name: Sandeepa Singh
+  email: sandeepa.singh@ibm.com
+  discord: sandeepa.singh