OSSM-3575: update configmap in OSSM uninstallation Doc

Author: Tim O'Keefe

modules/nodes-scheduler-node-selectors-about.adoc

@@ -61,8 +61,9 @@ metadata:
     kubernetes.io/hostname: ip-10-0-131-14
     beta.kubernetes.io/arch: amd64
     region: east <1>
+    type: user-node
 ----
-<1> Label to match the pod node selector.
+<1> Labels to match the pod node selector.
 endif::openshift-origin[]
 ifdef::openshift-origin[]
 .Sample `Node` object with a label
@@ -87,8 +88,9 @@ metadata:
     kubernetes.io/hostname: ip-10-0-131-14
     beta.kubernetes.io/arch: amd64
     region: east <1>
+    type: user-node
 ----
-<1> Label to match the pod node selector.
+<1> Labels to match the pod node selector.
 endif::openshift-origin[]
 +
 A pod has the `type: user-node,region: east` node selector:
@@ -106,7 +108,7 @@ spec:
     region: east
     type: user-node
 ----
-<1> Node selectors to match the node label.
+<1> Node selectors to match the node label. The node must have a label for each node selector.
 +
 When you create the pod using the example pod spec, it can be scheduled on the example node.