pin vtk to 9.6.0 before GetCells is deprecated

[PolarBean]

tests have begun failing. I think it is due to a dependancy being updated and us relying on deprecated functions.

[PolarBean]

This fixes the failure that was occuring on the previous commit to main .

Should I follow this up with an issue on Vedo?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[IgorTatarnikov]

Ah, I went down a rabbit hole before seeing your second comment, didn't see that you offered to open an issue in vedo. I got carried away and opened the issue myself. See marcomusy/vedo#1292

I propose instead of pinning, we just filter the DeprecationWarnings on those specific tests. They don't fail as of now, but just throw a warning. We can add @pytest.mark.filterwarnings("ignore::DeprecationWarning") to the offending tests, until it's fixed upstream.

[IgorTatarnikov]

Looks like this is fixed as of https://github.com/marcomusy/vedo/releases/tag/v2026.6.1, see https://github.com/brainglobe/brainglobe-atlasapi/actions/runs/21959269947.

I think this can be closed now.