Update COO channel to stable

COO 1.0.0 now publishes their artifacts in the stable channel

The development channel that was in use is no longer available

Update docs to reflect this

Author: vkmc

doc-Service-Telemetry-Framework/modules/proc_deploying-observability-operator.adoc

@@ -22,7 +22,7 @@ metadata:
   name: cluster-observability-operator
   namespace: openshift-operators
 spec:
-  channel: development
+  channel: stable
   installPlanApproval: Automatic
   name: cluster-observability-operator
   source: redhat-operators

doc-Service-Telemetry-Framework/modules/proc_deploying-stf-on-openshift-disconnected-environments.adoc

@@ -47,7 +47,7 @@ mirror:
           - name: stable-1.5
       - name: cluster-observability-operator
         channels:
-          - name: development
+          - name: stable
 ----