feat(deps): update renovate/renovate docker tag to v31.3.1

This MR contains the following updates:

Package	Update	Change
renovate/renovate	minor	31.2.2 -> 31.3.1

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Release Notes

renovatebot/renovate

v31.3.1

31.3.1 (2021-12-16)

Build System

• deps: update dependency markdown-it to v12.3.0 (#​13155) (ede1d2b)

v31.3.0

Features

• autodiscover: allow array for autodiscoverfilter (#​13100) (a0a7703)
• github actions: discover workflow files in subfolders (#​13143) (0bf92c5)
• managers/gradle: add support for plugin short syntax in gradle TOML catalogs (#​13147) (feb3f95)

Bug Fixes

• config: add package rule to preserveSemverRanges (#​13137) (6a027d2)

Documentation

• use cases: improve and simplify text (#​13142) (015a6b7)

Tests

• manager/gradle-wrapper: fix snapshot regression in gradle-wrapper (#​13144) (ab3dc4e)
• manager/gradle-wrapper: migrate to fs.readLocalFile (#​13123) (395cab2)
• util/git: Use global timeout setting (#​13141) (992d3f6)
• workers/pr: Explicit snapshots for release notes (#​13145) (8d1ac78)

Miscellaneous Chores

• deps: update dependency ts-jest to v27.1.1 (#​13114) (971ef92)
• deps: update node.js to 4be99ea (#​13153) (15ebe5c)
• revert git timeout change (7b91912)

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