chore(deps): update golang docker tag to v1.25.4 (#964)

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

Author: renovate[bot]

core/build-image.sh

@@ -11,7 +11,7 @@ if ! buildah containers --format "{{.ContainerName}}" | grep -q gobuilder-core;
     echo "Pulling Golang runtime..."
     golang_cache_path="${PWD}/.golang-cache"
     mkdir -vp "${golang_cache_path}/{mcache,bcache}"
-    buildah from --name gobuilder-tmp docker.io/library/golang:1.25.3-bookworm
+    buildah from --name gobuilder-tmp docker.io/library/golang:1.25.4-bookworm
     buildah config --env GOCACHE=/var/lib/misc/bcache --env GOMODCACHE=/var/lib/misc/mcache gobuilder-tmp
     buildah commit --rm gobuilder-tmp gobuilder-image
     buildah from --name gobuilder-core \