chore(deps): update quay.io/helmpack/chart-testing docker tag to v3.9.0

This MR contains the following updates:

Package	Type	Update	Change
quay.io/helmpack/chart-testing	image	minor	`v3.8.0` -> `v3.9.0`

helm/chart-testing (quay.io/helmpack/chart-testing)

update goreleaser flags by @cpanato in https://github.com/helm/chart-testing/pull/539
feat: verify if targetBranch is present in git repo by @fty4 in https://github.com/helm/chart-testing/pull/511
add github grouping of log lines by @joejulian in https://github.com/helm/chart-testing/pull/556
fix for ct install getting stuck when printing logs: close readers when done with reading by @skylenet in https://github.com/helm/chart-testing/pull/557
update golangci and helm by @cpanato in https://github.com/helm/chart-testing/pull/575
add --extra-helm-args to ct lint by @AndersBennedsgaard in https://github.com/helm/chart-testing/pull/552
Fix for Dockerfile smell DL3048 by @grosa1 in https://github.com/helm/chart-testing/pull/543

@fty4 made their first contribution in https://github.com/helm/chart-testing/pull/511
@joejulian made their first contribution in https://github.com/helm/chart-testing/pull/556
@skylenet made their first contribution in https://github.com/helm/chart-testing/pull/557
@AndersBennedsgaard made their first contribution in https://github.com/helm/chart-testing/pull/552
@grosa1 made their first contribution in https://github.com/helm/chart-testing/pull/543