fix a typo in README.md (googleforgames#1505)

README.md

@@ -15,7 +15,7 @@ _Agones, is derived from the Greek word agōn which roughly translates to “con
 Agones replaces usual bespoke or proprietary cluster management and game server scaling solutions with a [Kubernetes](https://kubernetes.io/) cluster
 that includes the Agones custom _[Kubernetes Controller](https://kubernetes.io/docs/concepts/api-extension/custom-resources/#custom-controllers)_ and matching [Custom Resource Definitions](https://kubernetes.io/docs/concepts/api-extension/custom-resources/#customresourcedefinitions) for _GameServers_, _Fleets_ and more.
 
-With Agones, Kubernetes gets native abilities to create, run, manage and scale dedicated game server processes within Kubernetes clusters using standard Kubernetes tooling and APIs. This model also allows any matchmaker to interact directly with Agones via the Kubernetes API to provision a dedicated a game server.
+With Agones, Kubernetes gets native abilities to create, run, manage and scale dedicated game server processes within Kubernetes clusters using standard Kubernetes tooling and APIs. This model also allows any matchmaker to interact directly with Agones via the Kubernetes API to provision a dedicated game server.
 
 For more details on why this project was written, read the
 [announcement blog post](https://cloudplatform.googleblog.com/2018/03/introducing-Agones-open-source-multiplayer-dedicated-game-server-hosting-built-on-Kubernetes.html).