Update Set-Label.md

Author: chrisda

exchange/exchange-ps/exchange/Set-Label.md

@@ -581,11 +581,13 @@ Accept wildcard characters: False
 ```
 
 ### -ContentType
-The ContentType parameter specifies where the sensivity label can be applied to. Possible values are:
+The ContentType parameter specifies where the sensivity label can be applied. Valid values are:
+
 - File, Email
 - Site, UnifiedGroup
 - PurviewAssets
-Values can be combined, for example "File, Email, PurviewAssets". Splitting related content types like "File, Email" is not supported.
+
+Values can be combined, for example: "File, Email, PurviewAssets". Splitting related content types like "File, Email" into "File" and "Email" is not supported.
 
 ```yaml
 Type: MipLabelContentType