[DOC] `dtw_distance` window parameter doc

[MatthewMiddlehurst]

Describe the issue linked to the documentation

End is either incomplete or accidentally added on.

window : float or None, default=None
    The window to use for the bounding matrix. If None, no bounding matrix
    is used. window is a percentage deviation, so if ``window = 0.1`` then
    10% of the series length is the max warping allowed.
    is used.

Suggest a potential alternative/fix

No response