Move over dashboard connection docs (#5877)
Move over dashboard connection docs (#5877)

We're removing the old docs in distributed.dask.org
jakirkham/dask,blaze/dask,mrocklin/dask,blaze/dask,dask/dask,mrocklin/dask,dask/dask,ContinuumIO/dask,jakirkham/dask,ContinuumIO/dask