fix: add tolerance for ambiguous behavior in gh run list

[bolinfest]

I am not sure what is going on, as #3660 introduced this new logic and I swear that CI was green before I merged that PR, but I am seeing failures in this CI job this morning. This feels like a non-backwards-compatible change in gh, but that feels unlikely...

Nevertheless, this is what I currently see on my laptop:

$ gh --version
gh version 2.76.2 (2025-07-30)
https://github.com/cli/cli/releases/tag/v2.76.2
$ gh run list --workflow .github/workflows/rust-release.yml --branch rust-v0.40.0 --json workflowName,url,headSha --jq 'first(.[])'
{
  "headSha": "5268705a69713752adcbd8416ef9e84a683f7aa3",
  "url": "https://github.com/openai/codex/actions/runs/17952349351",
  "workflowName": ".github/workflows/rust-release.yml"
}

Looking at sample output from an old GitHub issue (cli/cli#6678), it appears that, at least at one point in time, the workflowName was not the path to the workflow.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Account for workflowName path variant in alpha builds

The new --workflow .github/workflows/rust-release.yml logic tolerates the gh run list behavior change when resolving release workflows, but the alpha path still depends on fetch_workflow_url_for_version returning a run whose workflowName equals "rust-release". When the CLI returns .github/workflows/rust-release.yml (the scenario this patch targets), alpha staging still raises "Unable to locate workflow for version …" even though the run exists. Consider applying the same filtering (or checking both names) in fetch_workflow_url_for_version so both release and alpha flows succeed.

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