Update README.md

README.md

@@ -11,7 +11,7 @@ This action is a fork of https://github.com/tibdex/backport, it adds support for
 2.  :speech_balloon: Let's say you want to backport a pull request on a branch named `production`.
     Then label it with `backport production`. (See [how to create labels](https://help.github.com/articles/creating-a-label/).)
 3.  :sparkles: That's it! When the pull request gets merged, it will be backported to the `production` branch.
-    If the pull request cannot be backported, a comment explaining why will automatically be posted.
+    If the pull request cannot be backported, a comment explaining why will automatically be posted and the pull request will be labeled with `backport failed`.
 
 _Note:_ multiple backport labels can be added.
 For example, if a pull request has the labels `backport staging` and `backport production` it will be backported to both branches: `staging` and `production`.