Add a reminder to the PR template that this is a public repo #1307

Job	Run time
Upload debug artifacts after failure in analyze (stable-v2.20.3)	1m 57s
Upload debug artifacts after failure in analyze (default)	3m 26s
Upload debug artifacts after failure in analyze (linked)	3m 25s
Upload debug artifacts after failure in analyze (nightly-latest)	3m 13s
Download and check debug artifacts after failure in analyze	13s
	12m 14s

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