fix(deps): update ghcr.io/renovatebot/base-image docker tag to v7.15.9 (#30905)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

tools/docker/Dockerfile

@@ -5,17 +5,17 @@ ARG BASE_IMAGE_TYPE=slim
 # --------------------------------------
 # slim image
 # --------------------------------------
-FROM ghcr.io/renovatebot/base-image:7.15.8@sha256:5305381b9f3a9dd5ef5ae567d7c5fbfb780da08c5ce2710e54192041c9cfae90 AS slim-base
+FROM ghcr.io/renovatebot/base-image:7.15.9@sha256:2358998f33fd3c6dcf39e469af5cf17fafa37a7d1963eccba72a3f168f985a8c AS slim-base
 
 # --------------------------------------
 # full image
 # --------------------------------------
-FROM ghcr.io/renovatebot/base-image:7.15.8-full@sha256:86182ff23072bc711096060cf90edf39949e9e6441e586bc965afc8f24064e21 AS full-base
+FROM ghcr.io/renovatebot/base-image:7.15.9-full@sha256:769049a2df1a0c7b334eee3a2727271822162815b63d7e38eba45e130587a35a AS full-base
 
 # --------------------------------------
 # build image
 # --------------------------------------
-FROM --platform=$BUILDPLATFORM ghcr.io/renovatebot/base-image:7.15.8@sha256:5305381b9f3a9dd5ef5ae567d7c5fbfb780da08c5ce2710e54192041c9cfae90 AS build
+FROM --platform=$BUILDPLATFORM ghcr.io/renovatebot/base-image:7.15.9@sha256:2358998f33fd3c6dcf39e469af5cf17fafa37a7d1963eccba72a3f168f985a8c AS build
 
 # We want a specific node version here
 # renovate: datasource=node-version