[test] 🎨 fix test description string

[yannicks1]

[test] 🎨 fix test description string

changes:

• number of available blocks was missing (note we don't state it if set to 1000 (no restriction)
• number of available blocks was stated wrongly (8 instead of 4)

[yannicks1]

bot:test

[github-actions]

👋 Hi! Thank you for contributing to vLLM support on Spyre.
Just a reminder: Make sure that your code passes all the linting checks, otherwise your PR won't be able to be merged. To do so, first install the linting requirements, then run format.sh and commit the changes. This can be done with uv directly:

uv sync --frozen --group lint --active --inexact

Or this can be done with pip:

uv pip compile --group lint > requirements-lint.txt
pip install -r requirements-lint.txt
bash format.sh

Now you are good to go 🚀

[sducouedic]

LGTM, I'll need to remember to update in the #409 PR