feat(docs): update maintainer list for neoverse_rd

Add Rohit.Mathew@arm.com to the maintainer list for Neoverse Reference
Design platforms.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I1b8a5714e2707162dd973d9a50215d0a6b622eb1
diff --git a/docs/about/maintainers.rst b/docs/about/maintainers.rst
index 3a8fd81..4a8169b 100644
--- a/docs/about/maintainers.rst
+++ b/docs/about/maintainers.rst
@@ -524,6 +524,8 @@
 :|G|: `thomas-arm`_
 :|M|: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
 :|G|: `vijayenthiran-arm`_
+:|M|: Rohit Mathew <Rohit.Mathew@arm.com>
+:|G|: `rohit-arm`_
 :|F|: plat/arm/board/neoverse_rd/common
 :|F|: plat/arm/board/neoverse_rd/platform/rdn1edge/
 :|F|: plat/arm/board/neoverse_rd/platform/rdn2/
@@ -1031,6 +1033,7 @@
 .. _raymo200915: https://github.com/raymo200915
 .. _remi-triplefault: https://github.com/repk
 .. _rockchip-linux: https://github.com/rockchip-linux
+.. _rohit-arm: https://github.com/rohit-arm
 .. _rupsin01: https://github.com/rupsin01
 .. _rutigl: https://github.com/rutigl
 .. _sandrine-bailleux-arm: https://github.com/sandrine-bailleux-arm