Update controller API build tooling

- Update both to their latest versions
- Ensure version variable is actually taken into account again...

Signed-off-by: Hidde Beydals <hello@hidde.co>

Makefile

@@ -38,8 +38,8 @@ FUZZ_TIME ?= 1m
 GO_STATIC_FLAGS=-ldflags "-s -w" -tags 'netgo,osusergo,static_build$(addprefix ,,$(GO_TAGS))'
 
 # API (doc) generation utilities
-CONTROLLER_GEN_VERSION ?= v0.7.0
-GEN_API_REF_DOCS_VERSION ?= v0.3.0
+CONTROLLER_GEN_VERSION ?= v0.11.1
+GEN_API_REF_DOCS_VERSION ?= e327d0730470cbd61b06300f81c5fcf91c23c113
 
 # If gobin not set, create one on ./build and add to path.
 ifeq (,$(shell go env GOBIN))
@@ -147,13 +147,13 @@ docker-push:  ## Push Docker image
 CONTROLLER_GEN = $(GOBIN)/controller-gen
 .PHONY: controller-gen
 controller-gen: ## Download controller-gen locally if necessary.
-	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen@v0.8.0)
+	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen@$(CONTROLLER_GEN_VERSION))
 
 # Find or download gen-crd-api-reference-docs
 GEN_CRD_API_REFERENCE_DOCS = $(GOBIN)/gen-crd-api-reference-docs
 .PHONY: gen-crd-api-reference-docs
 gen-crd-api-reference-docs: ## Download gen-crd-api-reference-docs locally if necessary
-	$(call go-install-tool,$(GEN_CRD_API_REFERENCE_DOCS),github.com/ahmetb/gen-crd-api-reference-docs@3f29e6853552dcf08a8e846b1225f275ed0f3e3b)
+	$(call go-install-tool,$(GEN_CRD_API_REFERENCE_DOCS),github.com/ahmetb/gen-crd-api-reference-docs@$(GEN_API_REF_DOCS_VERSION))
 
 ENVTEST = $(GOBIN)/setup-envtest
 .PHONY: envtest