Merge pull request #3253 from jupyterhub/dependabot/pip/images/single… #2064

Job	Run time
lint_and_validate_rendered_templates	27s
lint_and_validate_templates_with_schema	14s
lint_and_validate_templates_with_schema (v3.5.0)	31s
lint_shell_scripts	57s
test (latest, install)	4m 24s
test (stable, install, --set hub.image.name=jupyterhub/k8s-hub-slim --set prePuller.hook.enabled=...	5m 29s
test (v1.26, install, --set hub.existingSecret=test-hub-existing-secret --set proxy.secretToken=a...	5m 11s
test (v1.25, upgrade, stable, --set proxy.secretToken=aaaa1111 --set hub.cookieSecret=bbbb2222 --...	6m 10s
test (v1.24, upgrade, dev, --set proxy.secretToken=aaaa1111 --set hub.db.type=sqlite-pvc --set si...	6m 52s
test (v1.23, upgrade, 2.0.0, --set proxy.secretToken=aaaa1111 --set hub.cookieSecret=bbbb2222 --s...	7m 41s
	37m 56s

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