Fix typo in test JSON string for tool calling

Corrects the closing quote in the 'arguments' field of the test_meta_tool_calling test to ensure the escaped JSON is properly formatted.

Author: paxiaatucsdedu

libs/oci/tests/unit_tests/chat_models/test_oci_generative_ai.py

@@ -278,7 +278,7 @@ def mocked_response_escaped(*args, **kwargs):  # type: ignore[no-untyped-def]
                                                                 "id": "call_escaped",
                                                                 "name": "get_weather",
                                                                 # Escaped JSON (the bug scenario)  # noqa: E501
-                                                                "arguments": '"{{\\"location\\": \\"San Francisco\\"}}"}',  # noqa: E501
+                                                                "arguments": '"{{\\"location\\": \\"San Francisco\\"}}"',  # noqa: E501
                                                                 "attribute_map": {
                                                                     "id": "id",
                                                                     "type": "type",