fix: Correctly format makefile help rule (grafana#3021)

Makefile

@@ -39,7 +39,7 @@ HELM_ARGS =
 
 .PHONY: help
 help: ## Describe useful make targets
-	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "%-30s %s\n", $$1, $$2}'
+	@grep -E '^[a-zA-Z_/-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ": .*?## "}; {printf "%-50s %s\n", $$1, $$2}'
 
 .PHONY: all
 all: lint test build ## Build, test, and lint (default)