Merge pull request #38686 from opayne1/BZ2014246

BZ2014246: Correcting command to upgrade clusterversion channel

Author: lpettyjo

modules/understanding-upgrade-channels.adoc

@@ -121,7 +121,7 @@ A channel can be switched from the web console or through the `adm upgrade chann
 
 [source,terminal]
 ----
-$ oc adm upgrade channel clusterversion version --type json -p '[{"op": "add", "path": "/spec/channel", "value": "<channel>”}]'
+$ oc adm upgrade channel <channel>
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 The web console will display an alert if you switch to a channel that does not include the current release. The web console does not recommend any updates while on a channel without the current release. You can return to the original channel at any point, however.