DOC: RT03 fix for read_sql method (pandas-dev#57638)

* RT03 fix for read_sql method

* Review suggestions implemented

Author: YashpalAhlawat

ci/code_checks.sh

@@ -882,7 +882,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         pandas.read_orc\
         pandas.read_sas\
         pandas.read_spss\
-        pandas.read_sql\
         pandas.read_sql_query\
         pandas.read_stata\
         pandas.set_eng_float_format\

pandas/io/sql.py

@@ -608,6 +608,9 @@ def read_sql(
     Returns
     -------
     DataFrame or Iterator[DataFrame]
+        Returns a DataFrame object that contains the result set of the
+        executed SQL query or an SQL Table based on the provided input,
+        in relation to the specified database connection.
 
     See Also
     --------