Update renovate/renovate Docker tag to v31.22.1

This MR contains the following updates:

Package	Type	Update	Change
renovate/renovate	Kustomization	patch	31.22.0 -> 31.22.1

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Release Notes

renovatebot/renovate

v31.22.1

31.22.1 (2022-01-10)

Documentation

• dependency-pinning: use document fragment (#​13464) (013189b)

Code Refactoring

• datasource/artifactory: Enable strict null checks (#​13446) (b4e8c54)

Build System

• deps: update dependency slugify to v1.6.5 (#​13468) (875023b)

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