Fix broken link in Traffic Controller README
@@ -24,7 +24,7 @@ library.
## Architecture Within Loggregator
-![Loggregator Diagram](../../docs/trafficcontroller.png)
+![Loggregator Diagram](./trafficcontroller.png)
Logging data passes through the system as
[protocol-buffers](https://github.com/google/protobuf), using
