[Bugfix] Fixing requirements.txt

[noamgat]

Pip requires a comma between multiple version requirements in a single line. This small fix makes
pip install -e .
work again.

[youkaichao]

really? currently it works though, without this fix.

[WoosukKwon]

@youkaichao I checked that the current one doesn't work with pip install -e .:

  error: subprocess-exited-with-error
  
  × Getting requirements to build editable did not run successfully.
  │ exit code: 1
  ╰─> [5 lines of output]
      /tmp/pip-build-env-yb6olylr/overlay/lib/python3.10/site-packages/torch/nn/modules/transformer.py:20: UserWarning: Failed to initialize NumPy: No module named 'numpy' (Triggered internally at ../torch/csrc/utils/tensor_numpy.cpp:84.)
        device: torch.device = torch.device(torch._C._get_default_device()),  # torch.device('cpu'),
      error in vllm setup command: 'install_requires' must be a string or list of strings containing valid project/version requirement specifiers; Expected end or semicolon (after version specifier)
          vllm-nccl-cu12>=2.18<2.19

[youkaichao]

Okay, I see it from https://packaging.python.org/en/latest/specifications/version-specifiers/#id5 . Thanks for the fix!