Adds torch.compile documentation to alexnet example readme

[crmdias]

Description

Adds instructions on how to serve alexnet model with torch.compile

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Feature/Issue validation/testing

Manual execution of the steps in the documentation renders the documented results

Checklist:

• Did you have fun?
  Have you added tests that prove your fix is effective or that this feature works? Doc Only
  Has code been commented, particularly in hard-to-understand areas? Doc Only
• Have you made corresponding changes to the documentation?

[agunapal]

Thanks for the PR. Looks good! A couple of minor edits are needed.

[agunapal]

LGTM