update search api doc

doc/sphinx-guides/source/api/search.rst

@@ -39,7 +39,7 @@ geo_point        string	  Latitude and longitude in the form ``geo_point=42.3,-7
 geo_radius       string	  Radial distance in kilometers from ``geo_point`` (which must be supplied as well) such as ``geo_radius=1.5``.
 metadata_fields  string	  Includes the requested fields for each dataset in the response. Multiple "metadata_fields" parameters can be used to include several fields. The value must be in the form "{metadata_block_name}:{field_name}" to include a specific field from a metadata block (see :ref:`example <dynamic-citation-some>`) or "{metadata_field_set_name}:\*" to include all the fields for a metadata block (see :ref:`example <dynamic-citation-all>`). "{field_name}" cannot be a subfield of a compound field. If "{field_name}" is a compound field, all subfields are included.
 show_type_counts boolean  Whether or not to include total_count_per_object_type for types: dataverse, dataset, and files.
-===============  =======  ===========
+================ =======  ===========
 
 Basic Search Example
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