Docs: Update configuration.rst (#4317)
Docs: Update configuration.rst (#4317)

This PR updates `configuration.rst` with some punctuation improvements and naming convention corrections. Additionally, a fix to a highlighted string is applied, and also it is slightly reordered in the sentence to improve its reading flow (at least for me it looks slightly better formatted this way).
ContinuumIO/dask,blaze/dask,ContinuumIO/dask,mrocklin/dask,dask/dask,jakirkham/dask,jakirkham/dask,blaze/dask,jcrist/dask,dask/dask,mrocklin/dask,jcrist/dask