fix maintainers TOML
fix maintainers TOML

the script in docker/opensource expects this format

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

AliyunContainerService/swarmkit,elifa/swarmkit,yongtang/swarmkit,vasil-yordanov/swarmkit,yp-engineering/swarmkit,deljuven/swarmkit,dperny/swarmkit-1,deljuven/swarmkit,diogomonica/swarmkit,fate-grand-order/swarmkit,RenaudWasTaken/swarmkit,docker/swarmkit,yongtang/swarmkit,docker/swarmkit,cheyang/swarmkit,diogomonica/swarmkit,cezarsa/swarmkit,alyyousuf7/swarmkit,sungwonh/swarmkit,elifa/swarmkit,allencloud/swarmkit,dperny/swarmkit-1,runshenzhu/swarmkit,jlhawn/swarmkit,yp-engineering/swarmkit,jlhawn/swarmkit,allencloud/swarmkit,cheyang/swarmkit,aaronlehmann/swarmkit,cezarsa/swarmkit,Noyan759/swarmkit,Noyan759/swarmkit,alyyousuf7/swarmkit,sungwonh/swarmkit,aaronlehmann/swarmkit,AliyunContainerService/swarmkit,fate-grand-order/swarmkit,RenaudWasTaken/swarmkit,vasil-yordanov/swarmkit,runshenzhu/swarmkit