Fix a link to Multiarch Tuning Operator

Author: hongkailiu

updating/updating_a_cluster/migrating-to-multi-payload.adoc

@@ -16,7 +16,7 @@ You can migrate your current cluster with single-architecture compute machines t
 
 For information about configuring your multi-architecture compute machines, see "Configuring multi-architecture compute machines on an {product-title} cluster".
 
-Before migrating your single-architecture cluster to a cluster with multi-architecture compute machines, it is recommended to install the Multiarch Tuning Operator, and deploy a `ClusterPodPlacementConfig` custom resource. For more information, see "Managing workloads on multi-architecture clusters by using the Multiarch Tuning Operator
+Before migrating your single-architecture cluster to a cluster with multi-architecture compute machines, it is recommended to install the Multiarch Tuning Operator, and deploy a `ClusterPodPlacementConfig` custom resource. For more information, see xref:../../post_installation_configuration/configuring-multi-arch-compute-machines/multiarch-tuning-operator.adoc#multiarch-tuning-operator[Managing workloads on multi-architecture clusters by using the Multiarch Tuning Operator].
 
 [IMPORTANT]
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