fix library name in docs ('cuvs' not 'pycuvs')

[jameslamb]

The Python library is distributed as conda package cuvs, but the installation docs say pycuvs. This fixes that.

Looked for other uses like this:

git grep -i pycuvs

Didn't find any.

[raydouglass]

I don't think there is a libcuvs_c package, but there is a libcuvs-static: https://github.com/rapidsai/cuvs/blob/branch-24.08/conda/recipes/libcuvs/meta.yaml#L18

[jameslamb]

There is a libcuvs_c shared library, with a C API over libcuvs:

https://github.com/rapidsai/cuvs/blob/9dc3a4dc5085cb5eb92d18ca1eafd5eef3dc405e/cpp/CMakeLists.txt#L556

https://github.com/rapidsai/cuvs/blob/9dc3a4dc5085cb5eb92d18ca1eafd5eef3dc405e/cpp/CMakeLists.txt#L588-L592

But you're right, it doesn't appear there's a conda package being distributed under that name.

I just pushed a commit updating the relevant docs, but maybe we should get another review from @benfred or @cjnolet to be sure the docs are representing these packages the way they'd like.

[dantegd]

I don't think there would be much point of a libcuvs_c, since it just contains the C-API that requires lubcuvs, so this change makes sense to me. Would like confirmation from @benfred that I'm not misremembering something.

[dantegd]

changes lgtm

[cjnolet]

/merge