[doc] add mlflow tracing integration

Signed-off-by: B-Step62 <[email protected]>

Author: B-Step62

docs/tracing.md

@@ -93,6 +93,7 @@ To customize this default setup, to send traces to alternative or additional bac
 ## External tracing processors list
 
 -   [Arize-Phoenix](https://docs.arize.com/phoenix/tracing/integrations-tracing/openai-agents-sdk)
+-   [MLflow](https://mlflow.org/docs/latest/tracing/integrations/openai-agent)
 -   [Braintrust](https://braintrust.dev/docs/guides/traces/integrations#openai-agents-sdk)
 -   [Pydantic Logfire](https://logfire.pydantic.dev/docs/integrations/llms/openai/#openai-agents)
 -   [AgentOps](https://docs.agentops.ai/v1/integrations/agentssdk)