Merge pull request #554 from stuggi/branch_var

Use conditional assignment for BRANCH

Author: openshift-merge-bot[bot]

Makefile

@@ -401,7 +401,7 @@ kuttl-test-cleanup:
 	fi
 
 CRD_SCHEMA_CHECKER_VERSION ?= release-4.16
-BRANCH=main
+BRANCH ?= main
 
 PHONY: crd-schema-check
 crd-schema-check: manifests