chore(deps): update registry.suse.com/bci/bci-base docker tag to v15.6 (main)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
registry.suse.com/bci/bci-base (source)	final	minor	15.5 -> 15.6

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Configuration

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[renovate]

Renovate Ignore Notification

Because you closed this PR without merging, Renovate will ignore this update (15.6). You will get a PR once a newer version is released. To ignore this dependency forever, add it to the ignoreDeps array of your Renovate config.

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