Code review fixes

examples/foundational/07z-interruptible-sarvam-http.py

@@ -72,9 +72,9 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
             ),
         )
 
-        llm = OpenAILLMService(
+        llm = SarvamLLMService(
             api_key=os.getenv("OPENAI_API_KEY"),
-            settings=OpenAILLMService.Settings(
+            settings=SarvamLLMService.Settings(
                 system_instruction="You are a helpful assistant in a voice conversation. Your responses will be spoken aloud, so avoid emojis, bullet points, or other formatting that can't be spoken. Respond to what the user said in a creative, helpful, and brief way.",
             ),
         )