Merge pull request #40300 from gabriel-rh/bz2029403

BZ2029403: Replace duplicated paragraph

Author: Christopher Tauchen

modules/update-oc-configmap-signature-verification.adoc

@@ -5,7 +5,7 @@
 [id="update-oc-configmap-signature-verification_{context}"]
 = Creating the config map for image signature verification by using the `oc` CLI
 
-Before you update your cluster, you must manually create a config map that contains the signatures of the release images that you use. This signature allows the Cluster Version Operator (CVO) to verify that the release images have not been modified by comparing the expected and actual image signatures.
+Use the `oc` CLI to simplify the creation of the image signature config map.
 
 .Prerequisites