fix(deps): update renovate/renovate docker tag to v31.38.4

This MR contains the following updates:

Package	Update	Change
renovate/renovate	patch	31.38.3 -> 31.38.4

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Release Notes

renovatebot/renovate

v31.38.4

31.38.4 (2022-01-20)

Bug Fixes

• bitbucket-tags: Add hostType and fallback for bitbucket-tags datasource (#​13697) (599958a)
• gitlab-packages: Add missing hostType for datasource calls (#​13696) (c378317)

Code Refactoring

• gitlab-changelog: Make url encoding consistent (#​13694) (c13b42c)

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