chore(docker): update docker digests

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
owncloud/ubuntu	final	digest	e7addaf -> fde0957
owncloud/ubuntu	final	digest	2cc5c08 -> 2f4742b
owncloud/ubuntu	final	digest	a1c283d -> 7b50cba

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