MAINTAINERS: use a URL for pin-init maintainer's profile entry

MAINTAINERS: use a URL for pin-init maintainer's profile entry

This maintainer's entry is not inside documentation nor is
ReST, preventing Sphinx to create a hyperlink to it.

Change it to point to the already-formatted URL.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Message-ID: <1bceee886b9027d66bbb48d9d6c8d1250ce8dbcb.1777987028.git.mchehab+huawei@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <59144e7323b95166e61a7c7f84096a0b9bb5d26e.1778309595.git.mchehab+huawei@kernel.org>