corrected link in TOC

Author: HollyCl

articles/operator-nexus/TOC.yml

@@ -137,7 +137,7 @@
             - name: Network Packet Broker
               href: howto-configure-network-packet-broker.md
             - name: Validate cables for Nexus Network Fabric
-              href: howto-validate-cables.md
+              href: how-to-validate-cables.md
     - name: Nexus Kubernetes cluster
       expanded: false
       items: