Fix broken link to project/MAINTAINERS.md
Fix broken link to project/MAINTAINERS.md

The link to project/MAINTAINERS.md was broken, in
addition, /MAINTAINERS containers more relevant
information on the LGTM process and contains info
about maintainers of all subsystems.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

ClusterHQ/docker-plugins,carlye566/docker_eric,AdamOssenford/docker-pi,ClusterHQ/docker-plugins,josemonsalve2/docker,josemonsalve2/docker,josemonsalve2/docker,AdamOssenford/docker-pi,carlye566/docker_eric,carlye566/docker_eric,seanmcdaniel/docker,ClusterHQ/docker-plugins,seanmcdaniel/docker,seanmcdaniel/docker,AdamOssenford/docker-pi