fix(deps): update ghcr.io/renovatebot/renovate docker tag to v38.18.16

This MR contains the following updates:

Package	Update	Change
ghcr.io/renovatebot/renovate (source)	patch	38.18.14 -> 38.18.16

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Release Notes

renovatebot/renovate (ghcr.io/renovatebot/renovate)

v38.18.16

Compare Source

Build System

• deps: update dependency redis to v4.7.0 (#​30599) (1141b9d)

v38.18.15

Compare Source

Bug Fixes

• deps: update ghcr.io/renovatebot/base-image docker tag to v7.8.8 (#​30597) (4c99aea)

Code Refactoring

• migrate traverse to neotraverse (#​30573) (607d7e3)

Tests

• manager/circleci: remove snapshots and empty matchObjects tests (#​30565) (b667a4b)

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