Clarify description of the label field in the README.md

Author: Richard Hua

README.md

@@ -1191,7 +1191,7 @@ Contains details about an update that has been downloaded locally or already ins
 - __isFirstRun__: Indicates whether this is the first time the update has been run after being installed. This is useful for determining whether you would like to show a "What's New?" UI to the end user after installing an update. *(Boolean)*
 - __isMandatory__: Indicates whether the update is considered mandatory.  This is the value that was specified in the CLI when the update was released. *(Boolean)*
 - __isPending__: Indicates whether this update is in a "pending" state. When `true`, that means the update has been downloaded and installed, but the app restart needed to apply it hasn't occurred yet, and therefore, it's changes aren't currently visible to the end-user. *(Boolean)*
-- __label__: The internal label automatically given to the update by the CodePush server. This value uniquely identifies the update within it's deployment. *(String)*
+- __label__: The internal label automatically given to the update by the CodePush server, such as `v5`. This value uniquely identifies the update within it's deployment. *(String)*
 - __packageHash__: The SHA hash value of the update. *(String)*
 - __packageSize__: The size of the code contained within the update, in bytes. *(Number)*