Update list of main maintainers
Update list of main maintainers

Change-Id: Ia4faf873f8946992737f76870ac92bc5cb3f4020
Signed-off-by: Sandrine Bailleux <4b69fcfca8da45b0c11ecda5434c5da526575d9d@arm.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware