Provide `Authorization` header when downloading `update-job-proxy` #4736

Job	Run time
Resolve environment (macos-latest, default)	2m 22s
Resolve environment (ubuntu-latest, default)	32s
Resolve environment (ubuntu-latest, linked)	35s
Resolve environment (ubuntu-latest, nightly-latest)	37s
Resolve environment (windows-latest, default)	1m 18s
Resolve environment (windows-latest, nightly-latest)	2m 36s
Resolve environment (macos-latest, nightly-latest)	1m 43s
Resolve environment (windows-latest, linked)	1m 48s
Resolve environment (macos-latest, linked)	1m 47s
	13m 18s

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