Fix typo in readme

Author: pvdissel

subprojects/listener/README.md

@@ -8,7 +8,7 @@ This listener supports multiple providers, GitHub being the first.
 Usage
 -----
 
-Pipeline Listener (`pipe-listener`) is provides a HTTP REST API that providers like GitHub can notify. The API is non-blocking, after basic verification of the notification message, the API will return a success (HTTP 204) or failure (HTTP 422) status. The notification message will be queued for processing a.s.a.p. by its processor.
+Pipeline Listener (`pipe-listener`) provides a HTTP REST API that providers like GitHub can notify. The API is non-blocking, after basic verification of the notification message, the API will return a success (HTTP 204) or failure (HTTP 422) status. The notification message will be queued for processing a.s.a.p. by its processor.
 
 ### GET /