Updates content_type to :_mod-docs-content-type:

Author: Steven Smith

modules/olm-updating-metallb-operatorgroup.adoc

@@ -2,7 +2,7 @@
 //
 // * operators/metallb/metallb-upgrading-operator.adoc
 
-:_content-type: PROCEDURE
+:_mod-docs-content-type: PROCEDURE
 [id="olm-updating-metallb-operatorgroup_{context}"]
 = Editing the MetalLB Operator Operator group
 

modules/virt-aws-bm.adoc

@@ -2,7 +2,7 @@
 //
 // * virt/install/preparing-cluster-for-virt.adoc
 
-:_content-type: CONCEPT
+:_mod-docs-content-type: CONCEPT
 [id="virt-aws-bm_{context}"]
 = {VirtProductName} on AWS bare metal