Bump follow-redirects from 1.14.8 to 1.15.5 in /frontend #6099

Job	Run time
Preliminary configuration	3s
Build (instance-operator)	1m 17s
Build (tenant-operator)	1m 15s
Build (bastion-operator)	1m 23s
Build (exam-agent)	1m 28s
Build (instmetrics)	1m 25s
Build (crownlabs-image-list)	28s
Build (delete-stale-instances)	26s
Build (frontend-app)	2m 56s
Build (qlkube)	41s
Build (tigervnc)	1m 24s
Build (websockify)	41s
Build (content-downloader)	50s
Build (content-uploader)	25s
Build (ssh-bastion)	19s
Build (img-exporter)	19s
Trigger events upon successful push to master	4s
Create a new CrownLabs release	0s
Trigger events upon /deploy-staging comment	0s
	15m 24s

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