docs: Updated docs to reference actually existing classes (#219)

README.md

@@ -438,7 +438,7 @@ The generated report will be available at ```target/site/jacoco/index.html```
 
 ## Configuration options
 
-The `UnleashConfigBuilder` class (created via `UnleashConfig.builder()`) exposes a set of builder methods to configure your Unleash client. The available options are listed below with a description of what they do. For the full signatures, take a look at the [`UnleashConfig` class definition](src/main/java/io/getunleash/util/UnleashConfig.java).
+The `UnleashConfig$Builder` class (created via `UnleashConfig.builder()`) exposes a set of builder methods to configure your Unleash client. The available options are listed below with a description of what they do. For the full signatures, take a look at the [`UnleashConfig` class definition](src/main/java/io/getunleash/util/UnleashConfig.java).
 
 
 | Method name                                | Description                                                                                                                                                                                                                                      | Required | Default value                                                                                                        |
@@ -466,7 +466,7 @@ The `UnleashConfigBuilder` class (created via `UnleashConfig.builder()`) exposes
 | `unleashAPI`                               | The URL of the Unleash API.                                                                                                                                                                                                                      | Yes      | `null`                                                                                                               |
 | `unleashContextProvider`                   | An [Unleash context provider used to configure Unleash](#2-via-an-unleashcontextprovider).                                                                                                                                                       | No       | `null`                                                                                                               |
 | `unleashFeatureFetcherFactory`             | A factory providing a FeatureFetcher implementation.                                                                                                                                                                                             | No       | [`HttpFeatureFetcher::new`](src/main/java/io/getunleash/repository/HttpFeatureFetcher.java)                          |
-| `unleashMetricsSenderFactory`              | A factory providing a MetricSender implementation.                                                                                                                                                                                               | No       | [`JavaHttpMetricsSender::new`](src/main/java/io/getunleash/metric/JavaHttpMetricsSender.java)                        |
+| `unleashMetricsSenderFactory`              | A factory providing a MetricSender implementation.                                                                                                                                                                                               | No       | [`DefaultHttpMetricsSender::new`](src/main/java/io/getunleash/metric/DefaultHttpMetricsSender.java)                  |
 
 When you have set all the desired options, initialize the configuration with the `build` method.
 You can then pass the configuration to the Unleash client constructor.