chore(docker): update docker digests

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
owncloud/ubuntu	final	digest	04c3990 -> 4ce1361
owncloud/ubuntu	final	digest	467eadd -> 7f21fa3
owncloud/ubuntu	final	digest	a5f34fa -> a6c9e44

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