Changing the replaces in CSV to 1.6.1

Signed-off-by: Piyush Nimbalkar <pnimbalkar@purestorage.com>

Author: Piyush Nimbalkar

deploy/olm-catalog/portworx/1.7.0/portworx-certified.clusterserviceversion.yaml

@@ -52,7 +52,7 @@ spec:
   version: 1.7.0
   minKubeVersion: "1.12.0"
   maturity: stable
-  replaces: portworx-operator.v1.6.0
+  replaces: portworx-operator.v1.6.1
   maintainers:
   - name: Portworx
     email: support@portworx.com