Bump helm-docs image version to v1.7.0 in Makefile (#3806)

Makefile

@@ -163,7 +163,7 @@ tilt-up: tilt manifests ## Generates the local manifests that tilt will use to d
 
 helm.docs: ## Generate helm docs
 	@cd $(HELM_DIR); \
-	docker run --rm -v $(shell pwd)/$(HELM_DIR):/helm-docs -u $(shell id -u) jnorwood/helm-docs:v1.5.0
+	docker run --rm -v $(shell pwd)/$(HELM_DIR):/helm-docs -u $(shell id -u) jnorwood/helm-docs:v1.7.0
 
 HELM_VERSION ?= $(shell helm show chart $(HELM_DIR) | grep 'version:' | sed 's/version: //g')