Merge pull request #90914 from Skalador/fix-OCPBUGS-53456

[OCPBUGS#53456] Fix the oc patch command for the global ip forwarding in metallb docs

Author: jeana-redhat

modules/nw-metallb-configure-secondary-interface.adoc

@@ -128,5 +128,5 @@ The output indicates that IPv4 and IPv6 packet forwarding is enabled on the `bri
 
 [source,terminal]
 ----
-$ oc patch network.operator cluster -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}
+$ oc patch network.operator cluster -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}' --type=merge
 ----