Fixed test_agent_types after Gemini 1.5 deprecation (#1043)

Author: jamesbraza

tests/test_agents.py

@@ -328,7 +328,7 @@ async def test_get_directory_index_w_no_citations(
 
 @pytest.mark.flaky(reruns=2, only_rerun=["AssertionError", "httpx.RemoteProtocolError"])
 @pytest.mark.parametrize("agent_type", [FAKE_AGENT_TYPE, ToolSelector, SimpleAgent])
-@pytest.mark.parametrize("llm_name", ["gpt-4o", "gemini/gemini-1.5-flash"])
+@pytest.mark.parametrize("llm_name", ["gpt-4o", "gemini/gemini-2.0-flash-lite"])
 @pytest.mark.asyncio
 async def test_agent_types(
     agent_test_settings: Settings,