ty: un-ignore parameter-already-assigned (1 file, 1 spot)

[HasanGenis]

plt.axes(projection="3d") is typed to return the base 2D Axes, so ax.scatter's 3rd positional argument (meant as zs) was resolving against 2D Axes.scatter's s parameter and colliding with the explicit s=100 kwarg — this was the repo's only parameter-already-assigned diagnostic. Cast ax to Axes3D so ty resolves the correct (xs, ys, zs, ...) overload instead (no runtime behavior change), and un-ignore the rule in pyproject.toml now that its diagnostic count is zero repo-wide.

Part of #15187

Describe your change

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Add or change doctests?
• Documentation change?

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[algorithms-keeper]

Closing this pull request as invalid

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