Document alternative for get_min/max_area

In the docstring for get_min_area and get_max_area, do not only write
that they are deprecated, but also write what should be used instead.

satpy/scene.py

@@ -316,6 +316,8 @@ def finest_area(self, datasets=None):
     def max_area(self, datasets=None):
         """Get highest resolution area for the provided datasets. Deprecated.
 
+        Deprecated.  Use :meth:`finest_area` instead.
+
         Args:
             datasets (iterable): Datasets whose areas will be compared. Can
                                  be either `xarray.DataArray` objects or
@@ -342,6 +344,8 @@ def coarsest_area(self, datasets=None):
     def min_area(self, datasets=None):
         """Get lowest resolution area for the provided datasets. Deprecated.
 
+        Deprecated.  Use :meth:`coarsest_area` instead.
+
         Args:
             datasets (iterable): Datasets whose areas will be compared. Can
                                  be either `xarray.DataArray` objects or