feat: Updated public cloud k8s tested versions

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: public-cloud-k8s-versions-check

Makefile

@@ -60,7 +60,7 @@ WOKE_VERSION ?= 0.19.0
 OPERATOR_SDK_VERSION ?= v1.39.2
 OPM_VERSION ?= v1.51.0
 PREFLIGHT_VERSION ?= 1.13.0
-OPENSHIFT_VERSIONS ?= v4.12-v4.19
+OPENSHIFT_VERSIONS ?= v4.12-v4.18
 ARCH ?= amd64
 
 export CONTROLLER_IMG