[event_viewer] Improve comments in example configuration

[skip ci]

conf.d/win32_event_log.yaml.example

@@ -2,18 +2,19 @@ init_config:
 
 instances:
   # Each Event Log instance lets you define the type of events you want to
-  # match and how to tag those events. You can use the following filters:
+  # match and how to tag those events.
+  # You can use one or more of the following filters:
   #
-  # - log_file: Application, System, Setup, Security
+  # - log_file: Application, System, Setup, Security, or application-specific LogFile
   #
   # - source_name: Any available source name
   #
-  # - type: Warning, Error, Information
+  # - type: Critical, Error, Warning, Information, Audit Success, Audit Failure
   #
   # - user: Any valid user name
   #
   # - event_id: The Event ID can be found through http://www.eventid.net/ and
-  #   viewed in the window event viewer.
+  #   viewed in the Windows Event Viewer.
   #
   # - message_filters: A list of message filters, using % as a wildcard.
   #   See http://msdn.microsoft.com/en-us/library/aa392263(v=vs.85).aspx for
@@ -23,7 +24,7 @@ instances:
 
   # Here are a couple basic examples:
 
-  # The following will capture errors and warnings from SQL Server which
+  # The following instance will capture errors and warnings from SQL Server which
   # puts all events under the MSSQLSERVER source and tag them with #sqlserver.
   #
   # - log_file: