Bump zenko-operator 1.8.0

Issue: ZENKO-5092

Author: francoisferrand

solution/deps.yaml

@@ -136,7 +136,7 @@ vault:
 zenko-operator:
   sourceRegistry: ghcr.io/scality
   image: zenko-operator
-  tag: v1.8.0-preview.2
+  tag: v1.8.0
   envsubst: ZENKO_OPERATOR_TAG
 zookeeper:
   sourceRegistry: pravega