Restore javadoc on EnvironmentResource.createEnvironmentResource

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/EnvironmentResource.java

@@ -26,6 +26,14 @@ final class EnvironmentResource {
   static final String ATTRIBUTE_PROPERTY = "otel.resource.attributes";
   static final String SERVICE_NAME_PROPERTY = "otel.service.name";
 
+  /**
+   * Create a {@link Resource} from the environment. The resource contains attributes parsed from
+   * environment variables and system property keys {@code otel.resource.attributes} and {@code
+   * otel.service.name}.
+   *
+   * @param config the {@link ConfigProperties} used to obtain resource properties
+   * @return the resource.
+   */
   @SuppressWarnings("JdkObsolete") // Recommended alternative was introduced in java 10
   static Resource createEnvironmentResource(ConfigProperties config) {
     AttributesBuilder resourceAttributes = Attributes.builder();