Fix sample code in 2.6.0 CHANGELOG.
@@ -9,7 +9,7 @@ Version 2.6.0 *(2019-06-05)*
```kotlin
@GET("users/{id}")
- suspend fun user(@Path("id") long id): User
+ suspend fun user(@Path("id") id: Long): User
```
Behind the scenes this behaves as if defined as `fun user(...): Call<User>` and then invoked with `Call.enqueue`.
