Fix capitalization typo

Author: mbaluda

python/ql/src/Security/CWE-1427/examples/example.py

@@ -1,11 +1,12 @@
 from flask import Flask, request
-from agents import Agent, Runner
+from agents import Agent
 from guardrails import GuardrailAgent
 
 @app.route("/parameter-route")
 def get_input():
     input = request.args.get("input")
 
+    goodAgent = GuardrailAgent(  # GOOD: Agent created with guardrails automatically configured.
         config=Path("guardrails_config.json"),
         name="Assistant",
         instructions="This prompt is customized for " + input)