Use correct MAX_DIM symbol

[athornton]

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

Should fix build failure in #73

[athornton]

@conda-forge-admin please rerender

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[athornton]

@conda-forge-admin please rerender

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-webservice.

I tried to rerender for you, but it looks like there was nothing to do.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/25704902599. Examine the logs at this URL for more detail.}

[athornton]

@conda-forge-admin please rerender

[t20100]

Thanks for the PR!

Integration of this patch is ongoing upstream: silx-kit/hdf5plugin#383

I'd like to update c-blosc2 to v3 first upstream in hdf5plugin and test it before moving to c-blosc2 v3 in conda-forge.