feat(deps): update renovate/renovate docker tag to v31.56.0

This MR contains the following updates:

Package	Update	Change
renovate/renovate	minor	31.53.2 -> 31.56.0

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Release Notes

renovatebot/renovate

v31.56.0

Features

• git: use git fetching for forkMode (#​13808) (152ad14)

v31.55.0

Features

• git-submodules: handle directory artifacts in postUpgradeTasks (#​13480) (25e62d5)

v31.54.0

Features

• poetry: support binarySource=install (#​13794) (47d158d)

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