[feature] Workflow for closing issues on merging PR linked to that issue

[Ratangulati]

Is your feature request related to a problem? Please describe.

I propose a workflow where the issue linked with a PR will be automatically closed when that PR is merged by the maintainer. This will save effort as the maintainers currently have to manually close an issue after merging a PR linked with that issue.

[github-actions[bot]]

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