Bump triton client version to avoid numpy<2

[nsmith-]

Per #1285 (comment)

This appears to be some negative interference between tritonclient and python 3.13, where numpy doesn't make wheels for numpy 1.x for python 3.13 and tritonclient doesn't yet allow numpy 2. So we have to build it from scratch. Yikes!
triton-inference-server/client#826

The linked PR should be released now

[nsmith-]

Looks like tritonclient>=2.56.0 should do per triton-inference-server/client#792 (comment)

coffea/.github/workflows/ci.yml

Line 68 in 7b8c44e

uv pip install 'tritonclient[grpc,http]!=2.41.0'

is where this is set up. (this might be good to add to a dependency group in pyproject.toml rather than in CI)