fix: update documentation owner's Github username for the ADK Triage Agent

PiperOrigin-RevId: 783951115

Author: xuanyang15

contributing/samples/adk_triaging_agent/agent.py

@@ -27,7 +27,7 @@
 
 LABEL_TO_OWNER = {
     "agent engine": "yeesian",
-    "documentation": "polong",
+    "documentation": "polong-lin",
     "services": "DeanChensj",
     "question": "",
     "tools": "seanzhou1023",