OCPBUGS#29653: Added note about the --overwrite flag

Author: bergerhoffer

modules/security-context-constraints-psa-opting.adoc

@@ -10,7 +10,7 @@ You can enable or disable automatic pod security admission synchronization for m
 
 [IMPORTANT]
 ====
-You cannot enable pod security admission synchronization on 
+You cannot enable pod security admission synchronization on
 ifndef::openshift-dedicated,openshift-rosa[]
 some
 endif::openshift-dedicated,openshift-rosa[]
@@ -20,6 +20,8 @@ system-created namespaces. For more information, see _Pod security admission syn
 .Procedure
 
 * For each namespace that you want to configure, set a value for the `security.openshift.io/scc.podSecurityLabelSync` label:
++
+--
 ** To disable pod security admission label synchronization in a namespace, set the value of the `security.openshift.io/scc.podSecurityLabelSync` label to `false`.
 +
 Run the following command:
@@ -37,3 +39,9 @@ Run the following command:
 ----
 $ oc label namespace <namespace> security.openshift.io/scc.podSecurityLabelSync=true
 ----
+--
++
+[NOTE]
+====
+Use the `--overwrite` flag to overwrite the value if this label is already set on the namespace.
+====