Add risk assessment to PR template #4244

Job	Run time
Resolve environment (macos-latest, default)	2m 27s
Resolve environment (windows-latest, default)	2m 45s
Resolve environment (macos-latest, nightly-latest)	1m 44s
Resolve environment (macos-latest, linked)	2m 34s
Resolve environment (ubuntu-latest, default)	34s
Resolve environment (ubuntu-latest, linked)	37s
Resolve environment (windows-latest, nightly-latest)	2m 39s
Resolve environment (windows-latest, linked)	2m 28s
Resolve environment (ubuntu-latest, nightly-latest)	40s
	16m 28s

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