Fix typo in cloud.rst (#5860)
Fix typo in cloud.rst (#5860)

remove extra letter from hyperlink display text
blaze/dask,blaze/dask,dask/dask,ContinuumIO/dask,dask/dask,ContinuumIO/dask,jakirkham/dask,mrocklin/dask,mrocklin/dask,jakirkham/dask