fix(deps): update renovate/renovate docker tag to v31.66.3

This MR contains the following updates:

Package	Update	Change
renovate/renovate	patch	31.66.1 -> 31.66.3
renovate/renovate	patch	31.66.0-slim -> 31.66.3-slim

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Release Notes

renovatebot/renovate

v31.66.3

31.66.3 (2022-02-04)

Bug Fixes

• git: Don't fetch if push has failed (#​13997) (99c30be)

Documentation

• contributing: use update branch button (#​13995) (f81e9ca)

v31.66.2

31.66.2 (2022-02-04)

Bug Fixes

• manager/helm-requirements: ensure currentValue is a string (#​13979) (2a013b3)

Miscellaneous Chores

• deps: update dependency type-fest to v2.11.0 (#​13976) (99c0e9c)

Code Refactoring

• datasource/dart: Enable strict null checks (#​13981) (8e3478e)
• datasource/hex: Enable strict null checks (#​13983) (b05844b)
• maven: Enable strict null checks (#​13980) (80663fe)
• tsconfig: Move datasources, managers and versioning to excluded section (#​13972) (d10b2ce)

Documentation

• composer supports update-lockfile rangeStrategy (#​13987) (3d9cbee)

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