fix(deps): update renovate/renovate docker tag to v31.13.6

This MR contains the following updates:

Package	Update	Change
renovate/renovate	patch	31.13.3 -> 31.13.6

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Release Notes

renovatebot/renovate

v31.13.6

31.13.6 (2021-12-27)

Tests

• lib/util: Refactor snapshot tests (#​13289) (15a1208)

Build System

• deps: update dependency good-enough-parser to v1.1.2 (#​13290) (4e69bfa)

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