Python: Bump to v1.39.1 for a release (#13455)

### Motivation and Context

Bump to v1.39.1 for a release

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### Description

Bump to v1.39.1 for a release

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### Contribution Checklist

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- [X] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [ ] I didn't break anyone 😄

Author: moonbox3

python/semantic_kernel/__init__.py

@@ -2,7 +2,7 @@
 
 from semantic_kernel.kernel import Kernel
 
-__version__ = "1.39.0"
+__version__ = "1.39.1"
 
 DEFAULT_RC_VERSION = f"{__version__}-rc9"
 

python/tests/unit/core_plugins/test_conversation_summary_plugin_unit.py

@@ -2,6 +2,8 @@
 
 from unittest.mock import AsyncMock, Mock
 
+import pytest
+
 from semantic_kernel.connectors.ai.chat_completion_client_base import ChatCompletionClientBase
 from semantic_kernel.connectors.ai.prompt_execution_settings import PromptExecutionSettings
 from semantic_kernel.contents.chat_message_content import ChatMessageContent
@@ -25,6 +27,7 @@ def test_conversation_summary_plugin_with_deprecated_value(kernel):
     assert plugin.return_key == "summary"
 
 
+@pytest.mark.asyncio
 async def test_summarize_conversation(kernel: Kernel):
     service = AsyncMock(spec=ChatCompletionClientBase)
     service.service_id = "default"