DOC: Add SA01 for pandas.Timestamp.asm8 (#58676)

* DOC: add SA01 for pandas.Timestamp.asm8

* DOC: remove SA01 for pandas.Timestamp.asm8

Author: tuhinsharma121

ci/code_checks.sh

@@ -269,7 +269,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.TimedeltaIndex.nanoseconds SA01" \
         -i "pandas.TimedeltaIndex.seconds SA01" \
         -i "pandas.TimedeltaIndex.to_pytimedelta RT03,SA01" \
-        -i "pandas.Timestamp.asm8 SA01" \
         -i "pandas.Timestamp.astimezone SA01" \
         -i "pandas.Timestamp.ceil SA01" \
         -i "pandas.Timestamp.combine PR01,SA01" \

pandas/_libs/tslibs/timestamps.pyx

@@ -1150,6 +1150,12 @@ cdef class _Timestamp(ABCTimestamp):
         """
         Return numpy datetime64 format in nanoseconds.
 
+        See Also
+        --------
+        numpy.datetime64 : Numpy datatype for dates and times with high precision.
+        Timestamp.to_numpy : Convert the Timestamp to a NumPy datetime64.
+        to_datetime : Convert argument to datetime.
+
         Examples
         --------
         >>> ts = pd.Timestamp(2020, 3, 14, 15)