Update container image to pull latest patch (nginx#275)

An important patch released, while early in development we
will prefer to pull the latest patch release from the
MAJOR.MINOR Nginx tag.

Author: miledxz

deploy/manifests/nginx-gateway.yaml

@@ -107,7 +107,7 @@ spec:
         args:
         - --gateway-ctlr-name=k8s-gateway.nginx.org/nginx-gateway-controller
         - --gatewayclass=nginx
-      - image: nginx:1.23.1
+      - image: nginx:1.23
         imagePullPolicy: IfNotPresent
         name: nginx
         ports: