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f7f1f630 - [CI] implement a bot to remind prs to link issues if not. (#13744)

[CI] implement a bot to remind prs to link issues if not. (#13744) * implement a bot to remind prs to link issues if not. * up * remove auto-close and add contribution guide. * restrict to one comment * Apply suggestions from code review Co-authored-by: sergereview[bot] <283583894+sergereview[bot]@users.noreply.github.com> * put dodgy stuff in try-except * limit to 2 days * style. --------- Co-authored-by: sergereview[bot] <283583894+sergereview[bot]@users.noreply.github.com>