Add a section id to Python Trigger Usage

This is so that the article durable-functions-serialization-and-persistence.md can reference the section.

Author: jparta

articles/azure-functions/durable/durable-functions-bindings.md

@@ -95,7 +95,7 @@ Here are some notes about the orchestration trigger:
 > Orchestrator functions should never be declared `async`.
 ::: zone-end
 
-### Trigger usage
+### Trigger usage {#python-trigger-usage}
 
 The orchestration trigger binding supports both inputs and outputs. Here are some things to know about input and output handling: