fix errors

Author: ktseng4096

ci/code_checks.sh

@@ -275,7 +275,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.core.groupby.SeriesGroupBy.nth PR02" \
         -i "pandas.core.groupby.SeriesGroupBy.ohlc SA01" \
         -i "pandas.core.groupby.SeriesGroupBy.plot PR02" \
-        -i "pandas.core.groupby.SeriesGroupBy.prod SA01" \
         -i "pandas.core.groupby.SeriesGroupBy.sem SA01" \
         -i "pandas.core.groupby.SeriesGroupBy.sum SA01" \
         -i "pandas.core.resample.Resampler.__iter__ RT03,SA01" \

pandas/core/groupby/groupby.py

@@ -3027,8 +3027,9 @@ def prod(self, numeric_only: bool = False, min_count: int = 0) -> NDFrameT:
 
         See Also
         --------
+        Series.prod : Return the product of the values over the requested axis.
         DataFrame.prod : Return the product of the values over the requested axis.
-        
+
         Examples
         --------
         For SeriesGroupBy: