chore(deps): update renovate/renovate docker tag to v38.18.12

This MR contains the following updates:

Package	Type	Update	Change
renovate/renovate (source)	image	patch	38.18.10 -> 38.18.12

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Release Notes

renovatebot/renovate (renovate/renovate)

v38.18.12

Compare Source

Build System

• deps: update dependency google-auth-library to v9.12.0 (#​30574) (bd1830a)
• deps: update dependency google-auth-library to v9.13.0 (#​30575) (affcef9)

v38.18.11

Compare Source

Bug Fixes

• deps: update ghcr.io/renovatebot/base-image docker tag to v7.8.7 (#​30571) (2c24ddb)

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