Update metadata in missing heartbeats troubleshooting doc

Updated the date and reviewer information, and modified the custom metadata for clarity.

Author: JarrettRenshaw

support/azure/azure-monitor/log-analytics/linux-agents/linux-agent-missing-heartbeats.md

@@ -1,11 +1,11 @@
 ---
 title: Troubleshoot missing heartbeats in Linux agents
 description: "Troubleshoot scenarios in which a Linux Log Analytics agent doesn't report heartbeats to the Log Analytics workspace."
-ms.date: 06/24/2024
-ms.reviewer: irfanr, nali2, arboisse, v-leedennis
+ms.date: 10/14/2025
+ms.reviewer: irfanr, nali2, arboisse, jarrettr
 editor: v-jsitser
 ms.service: azure-monitor
-ms.custom: sap:Linux Agents, linux-related-content
+ms.custom: sap:Azure Monitor Agent (AMA) on Linux machine, linux-related-content
 keywords:
 #Customer intent: As an Azure Monitor user, I want to troubleshoot why the Log Analytics agent for Linux doesn't report heartbeats to the Log Analytics workspace so that I can successfully monitor the health of my Linux virtual machine.
 ---