MAINTAINERS: update Open vSwitch maintainers

MAINTAINERS: update Open vSwitch maintainers

Pravin has not been active for a while, missingmaints reports:

Subsystem OPENVSWITCH
  Changes 138 / 253 (54%)
  (No activity)
  Top reviewers:
    [41]: aconole@redhat.com
    [31]: horms@kernel.org
    [23]: echaudro@redhat.com
    [8]: fw@strlen.de
    [6]: i.maximets@ovn.org
  INACTIVE MAINTAINER Pravin B Shelar <pshelar@ovn.org>

Let's elevate Aaron, Eelco and Ilya to the status of maintainers.

Acked-by: Aaron Conole <aconole@redhat.com>
Acked-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Acked-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250401001520.2080231-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>