⬆️ Update Update slackapi/slack-github-action action to v1.27.1 #1907

Job	Run time
core-ubuntu-22-lts / build	13m 12s
core-ubuntu-24-lts / build	12m 18s
core-alpine / build	12m 13s
core-ubuntu-24-10 / build	11m 10s
standard / build	13m 4s
reset-alpine / test	37m 51s
upgrade-alpine / test	41m 39s
install-alpine / test	21m 38s
acceptance-alpine / test	15m 55s
netboot-alpine / test	12m 2s
encryption-alpine (local-encryption) / test	10m 23s
encryption-alpine (remote-auto) / test	12m 50s
encryption-alpine (remote-https-bad-cert) / test	9m 49s
encryption-alpine (remote-https-pinned) / test	11m 27s
encryption-alpine (remote-static) / test	12m 1s
acceptance / test	18m 12s
bundles / test	54m 20s
reset / test	51m 34s
install-secureboot / test	20m 57s
install-target / test	16m 30s
install / test	20m 4s
netboot / test	14m 2s
upgrade / test	46m 22s
upgrade-latest / test	40m 29s
custom-partitioning (ubuntu, 24.04) / test	15m 36s
encryption (local-encryption) / test	13m 13s
encryption (remote-auto) / test	19m 40s
encryption (remote-https-bad-cert) / test	14m 34s
encryption (remote-https-pinned) / test	14m 32s
encryption (remote-static) / test	16m 18s
zfs / test	30m 38s
	10h 54m 33s

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