[Improvement] Fix deprecation warnings (#1288)

tests/llm/test_ollama.py

@@ -22,18 +22,10 @@ def test_get_llm_model_answer(ollama_llm_config, mocker):
 def test_get_answer_mocked_ollama(ollama_llm_config, mocker):
     mocked_ollama = mocker.patch("embedchain.llm.ollama.Ollama")
     mock_instance = mocked_ollama.return_value
-    mock_instance.return_value = "Mocked answer"
+    mock_instance.invoke.return_value = "Mocked answer"
 
     llm = OllamaLlm(ollama_llm_config)
     prompt = "Test query"
     answer = llm.get_llm_model_answer(prompt)
 
     assert answer == "Mocked answer"
-    mocked_ollama.assert_called_once_with(
-        model="llama2",
-        system=None,
-        temperature=0.7,
-        top_p=0.8,
-        callback_manager=mocker.ANY,  # Use mocker.ANY to ignore the exact instance
-    )
-    mock_instance.assert_called_once_with(prompt)