docs: ABI: sysfs-bus-mhi: Update contact info

@codeaurora.org email addresses are no longer valid and will bounce to
sender.  Also, Bhaumik has previously indicated he is no longer interested
in participating in MHI bus discussions.

Update contact info from Bhaumik to the mhi mail list so that mails will
be routed to the MHI maintainers and interested parties.

Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://lore.kernel.org/r/20230628182346.3855-1-quic_jhugo@quicinc.com


Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>