OCPBUGS#20304: Remove alpha flag from opm script

Author: michaelryanpeter

modules/olm-fb-catalogs-example.adoc

@@ -37,7 +37,7 @@ for l in $(yq e '.name as $catalog | .references[] | .image + "|" + $catalog + "
   file=$(echo $l | cut -d'|' -f2)
   opm render "$image" > "$file"
 done
-opm alpha generate dockerfile "$name"
+opm generate dockerfile "$name"
 indexImage=$(yq eval '.repo + ":" + .tag' catalog.yaml)
 docker build -t "$indexImage" -f "$name.Dockerfile" .
 docker push "$indexImage"