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

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:7.8.7@sha256:424ea814c1b8b3baabdd645e8599fa2b1e9d20506f66edb656a4a34d7bc8b672 AS slim-base
+FROM ghcr.io/renovatebot/base-image:7.8.8@sha256:23e8d14bf03b0c7baa295d9d234788f0e9f15521e6e44d27b30b7f2e7ac7d296 AS slim-base
 
 # --------------------------------------
 # full image
 # --------------------------------------
-FROM ghcr.io/renovatebot/base-image:7.8.7-full@sha256:e983484bc1680056672dc9d82961e034324b19f74e6f82a5ea544bf9a9728d65 AS full-base
+FROM ghcr.io/renovatebot/base-image:7.8.8-full@sha256:7fe23800c4e9c5957f978871feb4a6a4a5e032ba458e6761a47f3a71cc9c71e5 AS full-base
 
 # --------------------------------------
 # build image
 # --------------------------------------
-FROM --platform=$BUILDPLATFORM ghcr.io/renovatebot/base-image:7.8.7@sha256:424ea814c1b8b3baabdd645e8599fa2b1e9d20506f66edb656a4a34d7bc8b672 AS build
+FROM --platform=$BUILDPLATFORM ghcr.io/renovatebot/base-image:7.8.8@sha256:23e8d14bf03b0c7baa295d9d234788f0e9f15521e6e44d27b30b7f2e7ac7d296 AS build
 
 # We want a specific node version here
 # renovate: datasource=node-version