[18-stable] Update Makefile for 18-stable

Author: ospk8s-branching-bot[bot]

Makefile

@@ -378,7 +378,7 @@ run-with-webhook: manifests generate fmt vet ## Run a controller from your host.
 	/bin/bash hack/run_with_local_webhook.sh
 
 
-BRANCH ?= main
+BRANCH ?= 18-stable
 .PHONY: force-bump
 force-bump: ## Force bump operator and lib-common dependencies
 	for dep in $$(cat go.mod | grep openstack-k8s-operators | grep -vE -- 'indirect|keystone-operator|^replace' | awk '{print $$1}'); do \