Fix docstring errors for SeriesGroupBy.plot and SeriesGroupBy.indices#60443

gvmmybear wants to merge 3 commits intopandas-dev:mainpandas-dev/pandas:mainfrom

gvmmybear:fix_docstring_errors_SeriesGroupBy_plot_and_indicesgvmmybear/pandas:fix_docstring_errors_SeriesGroupBy_plot_and_indicesCopy head branch name to clipboard