datadog-apm: deprecate opentelemetry datadog exporter
-Datadog Exporter
-================
+Datadog Span Exporter
+=====================
+
+.. warning:: This exporter has been deprecated. To export your OTLP traces from OpenTelemetry SDK directly to Datadog Agent, please refer to `OTLP Ingest in Datadog Agent <https://docs.datadoghq.com/tracing/setup_overview/open_standards/#otlp-ingest-in-datadog-agent>`_ .
+
These examples show how to use OpenTelemetry to send tracing data to Datadog.
