Workflow doesn't work when the github_token is not specified

[V0XNIHILI]

Same issue is present for the formatter: chipsalliance/verible-formatter-action#17

In the README, it writes: "If you don't wish to use the automatic PR review, you can omit the github_token".

However, this doesn't seem to work for me, see example output log here: https://github.com/V0XNIHILI/parametrizable-floating-point-verilog/actions/runs/7738827016/job/21100439503?pr=23 (for code: V0XNIHILI/parametrizable-floating-point-verilog@0097a9d)

[tgorochowik]

Thank you for the report!
I can confirm the issue, apparently https://api.github.com/repos/chipsalliance/verible/releases/latest is no longer accessible without the token.

I don't think we can do much about it for now, the workarounds I see is providing a specific verible version when used without github_token (to be verified if it works).

We probably need to update the README to reflect this.

Would you be willing to submit a PR with the update?