AUTHORS: Add Somnath Chatterjee.

Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

AUTHORS.rst

@@ -382,6 +382,7 @@ Shih-Hao Li                        shihli@vmware.com
 Shu Shen                           shu.shen@radisys.com
 Simon Horman                       simon.horman@corigine.com
 Sivaprasad Tummala                 sivaprasad.tummala@intel.com
+Somnath Chatterjee                 somnath.b.chatterjee@ericsson.com
 Sorin Vinturis                     svinturis@cloudbasesolutions.com
 Sriharsha Basavapatna              sriharsha.basavapatna@broadcom.com
 Steffen Gebert                     steffen.gebert@informatik.uni-wuerzburg.de