doc: higlight the command to start the scheduler
doc: higlight the command to start the scheduler

Change-Id: I1071b46a7c70f9735764b728eb3161b5a761badf

Linaro/lava-server,OSSystems/lava-server,Linaro/lava-server,OSSystems/lava-server,Linaro/lava-server,OSSystems/lava-server,Linaro/lava-server