Bump setup-envtest

Author: sbueringer

Makefile

@@ -107,6 +107,7 @@ KUSTOMIZE_BIN := kustomize
 KUSTOMIZE := $(abspath $(TOOLS_BIN_DIR)/$(KUSTOMIZE_BIN)-$(KUSTOMIZE_VER))
 KUSTOMIZE_PKG := sigs.k8s.io/kustomize/kustomize/v5
 
+# FIXME: needs bump to release-0.21 before merge
 SETUP_ENVTEST_VER := release-0.20
 SETUP_ENVTEST_BIN := setup-envtest
 SETUP_ENVTEST := $(abspath $(TOOLS_BIN_DIR)/$(SETUP_ENVTEST_BIN)-$(SETUP_ENVTEST_VER))