Address review comment from @shafeeqes

Makefile

@@ -16,7 +16,7 @@ ENSURE_GARDENER_MOD := $(shell go get github.com/gardener/gardener@$$(go list -m
 GARDENER_HACK_DIR   := $(shell go list -m -f "{{.Dir}}" github.com/gardener/gardener)/hack
 VERSION             := $(shell cat VERSION)
 REPO_ROOT           := $(shell dirname "$(realpath $(lastword $(MAKEFILE_LIST)))")
-HACK_DIR 			:= $(REPO_ROOT)/hack
+HACK_DIR            := $(REPO_ROOT)/hack
 REGISTRY            := europe-docker.pkg.dev/gardener-project/snapshots
 IMAGE_REPOSITORY    := $(REGISTRY)/gardener/etcd-druid
 IMAGE_BUILD_TAG     := $(VERSION)