Update to 0.2.4.

[bdice]

Checklist

• [x] Used a personal fork of the feedstock to propose changes
• [x] Bumped the build number (if the version is unchanged)
• [x] Reset the build number to 0 (if the version changed)
• [x] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• [x] Ensured the license file is being packaged.

This PR updates NVTX to version 0.2.4. (Note that version 0.2.5 does not have a source distribution on PyPI.)

It also rebuilds against the latest nvtx-c, which is 3.1.0 as of this writing.

[conda-forge-webservices[bot]]

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) and found it was in an excellent condition.

[bdice]

@conda-forge-admin, please rerender