chore: longer retry to mitigate occasional issues with github installs #439

Job	Run time
Get Build Info	1s
Get CoreOS versions	12s
Build CoreOS (fedora-coreos, stable, -nvidia, -zfs, pr-99-)	2m 39s
Build uCore (ucore, stable, -nvidia, -zfs, pr-99-)	3m 32s
Build CoreOS (fedora-coreos, stable, -nvidia, pr-99-)	2m 20s
Build uCore (ucore, stable, -nvidia, pr-99-)	2m 57s
Build CoreOS (fedora-coreos, stable, -zfs, pr-99-)	2m 5s
Build uCore (ucore, stable, -zfs, pr-99-)	2m 16s
Build CoreOS (fedora-coreos, testing, -nvidia, -zfs, pr-99-)	2m 23s
Build uCore (ucore, stable, pr-99-)	2m 3s
Build CoreOS (fedora-coreos, testing, -nvidia, pr-99-)	2m 18s
Build uCore (ucore, testing, -nvidia, -zfs, pr-99-)	2m 57s
Build CoreOS (fedora-coreos, testing, -zfs, pr-99-)	1m 52s
Build uCore (ucore, testing, -nvidia, pr-99-)	2m 26s
Build uCore (ucore, testing, -zfs, pr-99-)	2m 29s
Build uCore (ucore, testing, pr-99-)	2m 16s
Build HCI (ucore, stable, -nvidia, -zfs, pr-99-)	2m 57s
Build HCI (ucore, stable, -nvidia, pr-99-)	2m 33s
Build HCI (ucore, stable, -zfs, pr-99-)	2m 37s
Build HCI (ucore, stable, pr-99-)	2m 42s
Build HCI (ucore, testing, -nvidia, -zfs, pr-99-)	2m 39s
Build HCI (ucore, testing, -nvidia, pr-99-)	2m 50s
Build HCI (ucore, testing, -zfs, pr-99-)	2m 30s
Build HCI (ucore, testing, pr-99-)	2m 34s
Check all builds successful	1s
	56m 9s

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