replace versions with variable refs

Author: fifthposition

data-sources.html.md.erb

@@ -152,9 +152,9 @@ The following table describes the data included in logs and metrics from each so
 <% if vars.platform_code == 'CF' || vars.platform_code == 'OFFLINE' %>
 
 <sup>1</sup>For more information about using the BOSH Health Monitor to collect health metrics
-on VMs, see [Selecting and configuring a monitoring system](https://docs.vmware.com/en/VMware-Tanzu-Application-Service/4.0/tas-for-vms/monitoring-metrics.html).
+on VMs, see [Selecting and configuring a monitoring system](https://docs.vmware.com/en/VMware-Tanzu-Application-Service/<%= vars.current_major_version %>/tas-for-vms/monitoring-metrics.html).
 
-<sup>2</sup>For more information about app logging, see [App Logging in TAS for VMs](https://docs.vmware.com/en/VMware-Tanzu-Application-Service/4.0/tas-for-vms/deploy-apps-streaming-logs.html).
+<sup>2</sup>For more information about app logging, see [App Logging in TAS for VMs](https://docs.vmware.com/en/VMware-Tanzu-Application-Service/<%= vars.current_major_version %>/tas-for-vms/deploy-apps-streaming-logs.html).
 
 <% else %>