MAINTAINERS: adjust the file entry in GOCONTROLL MODULINE MODULE SLOT

MAINTAINERS: adjust the file entry in GOCONTROLL MODULINE MODULE SLOT

Commit 8f1cc5242544 ("MAINTAINERS: add maintainer for the GOcontroll
Moduline module slot") adds a new MAINTAINERS section referring to the
non-existent file:
  Documentation/connector/gocontroll,moduline-module-slot.yaml

It intends to refer to the file with the same name in
Documentation/devicetree/bindings/connector/. Adjust the file reference to
the intended location.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Reviewed-by: Maud Spierings <maudspierings@gocontroll.com>
Link: https://patch.msgid.link/20250318080913.31455-1-lukas.bulwahn@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>