Switch cpu-inference workflow from --extra-index-url to --index-url (#5182)

This switch should cause no impact to the workflow, but ensures that we
only download this package from the correct feed rather than
defaulting/falling back to the index-url
[default](https://pip.pypa.io/en/stable/cli/pip_install/#cmdoption-i)
(PyPI) for if a package existed with a higher version there that would
be chosen instead.

Author: loadams

.github/workflows/cpu-inference.yml

@@ -64,7 +64,7 @@ jobs:
           python -m pip install intel_extension_for_pytorch
           # the curl line is for troubleshooting
           curl -L https://pytorch-extension.intel.com/release-whl/stable/cpu/us/
-          python -m pip install oneccl_bind_pt --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/cpu/us/
+          python -m pip install oneccl_bind_pt --index-url https://pytorch-extension.intel.com/release-whl/stable/cpu/us/
           pip install py-cpuinfo
           # check installed version
           pip list |grep \\\<torch\\\>