Update PR template to prompt for test coverage #1723

Job	Run time
Upload debug artifacts after failure in analyze (linked)	3m 32s
Upload debug artifacts after failure in analyze (nightly-latest)	2m 59s
Upload debug artifacts after failure in analyze (stable-v2.20.3)	2m 3s
Upload debug artifacts after failure in analyze (default)	3m 36s
Download and check debug artifacts after failure in analyze	10s
	12m 20s

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