update text block

Author: kpoineal

docs/content/tools/collector/_index.md

@@ -163,7 +163,8 @@ In PowerShell command line the configuration looks like:
 The configuration file is a text file that contains the parameters for the collector. The configuration file can be used to specify the subscriptions, resource groups, and tags to be included in the collector run.
 
 ### Example Configuration File
-```
+
+```text
 [tenantId]
 tenantid