updated toc and changed file name

Author: guywi-ms

articles/azure-monitor/logs/data-platform-logs.md renamed to articles/azure-monitor/logs/azure-monitor-logs.md

@@ -421,9 +421,9 @@ items:
     items:
     - name: Overview
       displayName: Platform logs, Resource logs, Activity log
-      href: essentials/platform-logs-overview.md
+      href: logs/azure-monitor-logs.md 
     - name: Platform logs
-      href: logs/data-platform-logs.md 
+      href: essentials/platform-logs-overview.md
     - name: Activity log
       href: essentials/activity-log.md
     - name: Resource logs