[CI] Prevents triggering of an inactive issue/PR check for forked repository.

[wzshiming]

https://github.com/wzshiming/vllm/actions/workflows/stale.yml

This isn't really useful for forked repositories. Perhaps we could add a check for that.

Purpose

Test Plan

Test Result

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Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.
• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[gemini-code-assist]

Note

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[Copilot]

Pull request overview

This PR adds a repository check to the stale issue/PR workflow to prevent it from running on forked repositories, which is a sensible optimization since the workflow is only needed on the main vllm-project/vllm repository.

Key Changes

• Added a conditional check to the close-issues-and-pull-requests job to only run when the repository is vllm-project/vllm

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[russellb]

lgtm