CI: Improve safety of update required checks script #5094

Job	Run time
Diagnostic export (ubuntu-latest, linked)	1m 11s
Diagnostic export (windows-latest, linked)	2m 0s
Diagnostic export (macos-latest, linked)	1m 4s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 8s
Diagnostic export (windows-latest, nightly-latest)	2m 56s
Diagnostic export (macos-latest, nightly-latest)	1m 16s
	9m 35s

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