feat(deps): update renovate/renovate docker tag to v31.70.0

This MR contains the following updates:

Package	Update	Change
renovate/renovate	minor	31.69.0 -> 31.70.0

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Release Notes

renovatebot/renovate

v31.70.0

Features

• npm: efficient update-lockfile reuse for lockfileVersion>=2 (#​14097) (9b6b59d)

Documentation

• update references to renovate/renovate to v31.68.6 (#​14094) (96d7775)

Code Refactoring

• datasource/github-releases: Consolidate into single file (#​14083) (08acc9a)
• datasource/terraform: Enable strict null checks (#​14050) (abc1197)

Miscellaneous Chores

• deps: update dependency @​types/node to v16.11.22 (#​14085) (805be7f)
• deps: update node.js to 56ef3a7 (#​14099) (31aab15)

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