Fix small docstring typos

[LiamConnors]

• Fix facet_row_spacing when facet_col_wrap is used value. Should be 0.07: https://github.com/plotly/plotly.py/blob/master/packages/python/plotly/plotly/express/_core.py#L2401-L2402
• Fix rendering of 'svg'

[gvwilson]

looks good to me - thank you