Update vm_compute metricset with more info on guest metrics (#20448)

* mofidy doc

* update doc

* changelog

CHANGELOG.next.asciidoc

@@ -310,6 +310,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Modify doc for app_insights metricset to contain example of config. {pull}20185[20185]
 - Add required option for `metrics` in app_insights. {pull}20406[20406]
 - Groups same timestamp metric values to one event in the app_insights metricset. {pull}20403[20403]
+- Updates vm_compute metricset with more info on guest metrics. {pull}20448[20448]
 
 *Packetbeat*
 

metricbeat/docs/modules/azure.asciidoc

@@ -16,7 +16,6 @@ The azure monitor metrics are numerical values that describe some aspect of a sy
 The azure module will periodically retrieve the azure monitor metrics using the Azure REST APIs as MetricList.
 Additional azure API calls will be executed in order to retrieve information regarding the resources targeted by the user.
 
-The azure module mericsets are `monitor`,  `compute_vm` and `compute_vm_scaleset`
 
 IMPORTANT: Extra Azure charges on metric queries may be generated by this module.
 Please see <<azure-api-cost,additional notes about metrics and costs>> for more details.

x-pack/metricbeat/module/azure/_meta/docs.asciidoc

@@ -8,7 +8,6 @@ The azure monitor metrics are numerical values that describe some aspect of a sy
 The azure module will periodically retrieve the azure monitor metrics using the Azure REST APIs as MetricList.
 Additional azure API calls will be executed in order to retrieve information regarding the resources targeted by the user.
 
-The azure module mericsets are `monitor`,  `compute_vm` and `compute_vm_scaleset`
 
 IMPORTANT: Extra Azure charges on metric queries may be generated by this module.
 Please see <<azure-api-cost,additional notes about metrics and costs>> for more details.