[MAINT]: Consider whether .github/workflows/immediate-response.yml makes sense in forks

[jsoref]

Describe the need

the greeter workflow ran in my fork: check-spelling-sandbox#1 (comment)

I imagine that's the wrong thing to do in forks.

SDK Version

No response

API Version

No response

Relevant log output

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Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

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