docs(maintainer): maintainer nomination (#12137)

## Motivation

<!-- Why are we doing this change -->

Add Jay Jijie Chen as Kuma maintainer.

### Nominee's first and last name

Jay Chen

### Nominee's email address and GitHub user name

Email: jijie.chen@outlook.com
Github: jijiechen

### An explanation of why the nominee should be a maintainer/reviewer

I wish to become a Kuma project maintainer to better engage in the
discussions, contributions, code reviews for substantial time.

Here are my significant contribution PRs and Issues for this project:
- [ci(actions): add the 'build-test-distribute' GitHub
Action](https://github.com/kumahq/kuma/pull/8360/files)
- [feat(transparent-proxy): deprecate argument
'redirect-inbound-port-v6' and introduce 'ip-family-mode'
](#8939)
- [feat(kuma-cni): add a init container to validate that iptables rules
are applied](#9699)
- [feat(kuma-dp): rework on the virtual probes to support probing tcp
and grpc ports](#10624)
- [test(framework): inspect clusters, stats and policies when DebugKube
on E2E failures](#11746)

## Implementation information

<!-- Explain how this was done and potentially alternatives considered
and discarded -->

## Supporting documentation

<!-- Is there a MADR? An Issue? A related PR? -->

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Signed-off-by: Jay Chen <1180092+jijiechen@users.noreply.github.com>
Signed-off-by: Bart Smykla <bartek@smykla.com>
Co-authored-by: Bart Smykla <bartek@smykla.com>

OWNERS.md

@@ -24,6 +24,7 @@ kumahq org group: https://github.com/orgs/kumahq/teams/kuma-maintainers
 - Marcin Skalski @Automaat (marcin.skalski@konghq.com)
 - Lukasz Dziedziak @lukidzi (lukidzi@gmail.com)
 - Icarus Wu @Icarus9913 (icarus.wu@konghq.com)
+- Jay Jijie Chen @jijiechen (jijie.chen@outlook.com)
 
 # Reviewers