chore(deps): pin dependencies

This MR contains the following updates:

Package	Type	Update	Change
registry.gitlab.com/ethz-hpc/pipelines/kube-linter	image	pinDigest	-> f0f8fbe
ubuntu	final	pinDigest	-> e3f92ab

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This MR has been generated by Renovate Bot.

assigned to @mminar

requested review from @mminar

mentioned in issue #1

approved this merge request

enabled an automatic merge when the pipeline for ac04da61 succeeds

mentioned in commit 01ca83f7

merged