* main: (24 commits)
  Fix overflow issue in decode_cf_datetime for dtypes <= np.uint32 (pydata#6598)
  Enable flox in GroupBy and resample (pydata#5734)
  Add setuptools as dependency in ASV benchmark CI (pydata#6609)
  change polyval dim ordering (pydata#6601)
  re-add timedelta support for polyval (pydata#6599)
  Minor Dataset.map docstr clarification (pydata#6595)
  New inline_array kwarg for open_dataset (pydata#6566)
  Fix polyval overloads (pydata#6593)
  Restore old MultiIndex dropping behaviour (pydata#6592)
  [docs] add Dataset.assign_coords example (pydata#6336) (pydata#6558)
  Fix zarr append dtype checks (pydata#6476)
  Add missing space in exception message (pydata#6590)
  Doc Link to accessors list in extending-xarray.rst (pydata#6587)
  Fix Dataset/DataArray.isel with drop=True and scalar DataArray indexes (pydata#6579)
  Add some warnings about rechunking to the docs (pydata#6569)
  [pre-commit.ci] pre-commit autoupdate (pydata#6584)
  terminology.rst: fix link to Unidata's "netcdf_dataset_components" (pydata#6583)
  Allow string formatting of scalar DataArrays (pydata#5981)
  Fix mypy issues & reenable in tests (pydata#6581)
  polyval: Use Horner's algorithm + support chunked inputs (pydata#6548)
  ...

* main:
  concatenate docs style (pydata#6621)
  Typing for open_dataset/array/mfdataset and to_netcdf/zarr (pydata#6612)
  {full,zeros,ones}_like typing (pydata#6611)