README.md in opentelemetry-exporters-datadog-0.1.0 vs README.md in opentelemetry-exporters-datadog-0.2.0

@@ -134,10 +134,10 @@
  - `DD_SERVICE`: Your application's default service name (e.g. `billing-api`)
  - `DD_VERSION`: Your application version (e.g. `2.5`, `202003181415`, `1.3-alpha`, etc.)
  - `DD_TAGS`: Custom tags in value pairs separated by `,` (e.g. `layer:api,team:intake`)
     - If `DD_ENV`, `DD_SERVICE` or `DD_VERSION` are set, it will override any respective `env`/`service`/`version` tag defined in `DD_TAGS`.
     - If `DD_ENV`, `DD_SERVICE` or `DD_VERSION` are NOT set, tags defined in `DD_TAGS` will be used to populate `env`/`service`/`version` respectively.
-
+    - As a fallback, Resource attributes `deployment.environment` `service.name`, and `service.version` will be used to populate `env`/`service`/`version` respectively.
 These values can also be overridden at the trace exporter level:
 
 ```ruby
 # Configure the sdk with custom export
 OpenTelemetry::SDK.configure do |c|