fix: replace label for multiple scatter

[jokasimr]

Fixes #451

[nvaytet]

Not sure why, but I tried the code in the issue, and I have the correct label y [m] along the vertical axis.
So it seems this was fixed already?

import scipp as sc
import plopp as pp

a = pp.data.scatter()
b = pp.data.scatter(seed=2) * 10.0
b.coords['x'] += sc.scalar(50.0, unit='m')

pp.scatter({'a': a, 'b': b})

Can you double-check?

[nvaytet]

Also works correctly for pp.scatter({'a': a}) and pp.scatter(a).

[nvaytet]

My guess is that it was fixed in https://github.com/scipp/plopp/pull/490/files#diff-27d11e8f8609ce7cd65b7314517bd96d9f9576419e191f04b9fee648be5fd3c6

(it works in version 25.10.0, although the colors are messed up, which was then fixed in #506)

[jokasimr]

Aha I see. Should've checked before "fixing" it 🙄

[nvaytet]

I suggest we remove the changes but keep the tests 😉

[nvaytet]

Why is the label [K]? Shouldn't it be y [m]?
I think K is the units of the data, not the xy coords?

[nvaytet]

I don't know why the CI is not running... 🤔