assign_coords docs: see also Dataset.set_coords (#7231)

Author: pierreloicq

xarray/core/common.py

@@ -601,6 +601,7 @@ def assign_coords(
         --------
         Dataset.assign
         Dataset.swap_dims
+        Dataset.set_coords
         """
         coords_combined = either_dict_or_kwargs(coords, coords_kwargs, "assign_coords")
         data = self.copy(deep=False)