entity-manager: christopher sides added as reviewer

I assume more reviewers always helpful, especially with HPE
adding components to the Entity-Manager repo

Change-Id: I2fe4647972890f1308ac81ed8fda1aa0384fae64
Signed-off-by: Chris Sides <Christopher.Sides@hpe.com>
diff --git a/OWNERS b/OWNERS
index 29ccc0d..147d72a 100644
--- a/OWNERS
+++ b/OWNERS
@@ -38,6 +38,7 @@
 - zhikui.ren@intel.com
 
 reviewers:
+- christopher.sides@hpe.com
 
 matchers:
 
@@ -54,3 +55,6 @@
 - name: Zhikui Ren
   email: zhikui.ren@intel.com
   discord: Zhikui
+- name: Christopher Sides
+  email: christopher.sides@hpe.com
+  discord: citysides