fixing location of sample rate in example

Author: johnkemnetz

articles/virtual-machines/extensions/diagnostics-linux.md

@@ -597,8 +597,8 @@ In each case, data is also uploaded to:
 ```json
 {
   "StorageAccount": "yourdiagstgacct",
-  "sampleRateInSeconds": 15,
   "ladCfg": {
+    "sampleRateInSeconds": 15,
     "diagnosticMonitorConfiguration": {
       "performanceCounters": {
         "sinks": "MyMetricEventHub,MyJsonMetricsBlob",