K8SPXC-1528 Updated the cluster-wide OLM doc (#226)

K8SPXC-1528 Updated the cluster-wide OLM doc

Added info that Operator is available from Certified catalog

Author: nastena1606

__pycache__/main.cpython-311.pyc

@@ -34,11 +34,11 @@ Following steps will allow you to deploy the Operator and Percona XtraDB Cluster
 
     !!! note
 
-        If you are going to install the Operator in [multi-namespace (cluster-wide) mode](cluster-wide.md), please choose values with `-cw` suffix for the update channel and version, and select the "All namespaces on the cluster" radio button for the installation mode instead of chosing a specific Namespace:
+        To install the Operator in [multi-namespace (cluster-wide) mode](cluster-wide.md), use the one from the certified catalog. It has the Certified label. Choose values with `-cw` suffix for the update channel and version, and select the "All namespaces on the cluster" radio button for the installation mode instead of chosing a specific Namespace:
 
         ![image](assets/images/olm-cw.svg)
 
-    Click "Install" button to actually install the Operator.
+    Click "Install" to install the Operator.
 
 3. When the installation finishes, you can deploy Percona XtraDB Cluster. In the "Operator Details" you will see Provided APIs (Custom Resources, available for installation). Click "Create instance" for the `PerconaXtraDBCluster` Custom Resource.