Sweep: change to use claude sonnet 3.5 instead of opus

[d-walsh]

Description

This pull request updates the Anthropic client within the SweepAI utility to use a newer model version. Specifically, it transitions from using the "claude-3-opus-20240229" model to the "claude-3-5-sonnet-20240620" model. This change aims to leverage improvements and features available in the latest model version.

Summary

• Updated the Anthropic client model in sweepai/utils/anthropic_client.py.
• Changed the model from claude-3-opus-20240229 to claude-3-5-sonnet-20240620.
• Ensured that the logger correctly reflects the new model being used.

Fixes #4.

---

🎉 Latest improvements to Sweep:

• New dashboard launched for real-time tracking of Sweep issues, covering all stages from search to coding.
• Integration of OpenAI's latest Assistant API for more efficient and reliable code planning and editing, improving speed by 3x.
• Use the GitHub issues extension for creating Sweep issues directly from your editor.

---

💡 To get Sweep to edit this pull request, you can:

• Comment below, and Sweep can edit the entire PR
• Comment on a file, Sweep will only modify the commented file
• Edit the original issue to get Sweep to recreate the PR from scratch

This is an automated message generated by Sweep AI.

[d-walsh]

Rollback Files For Sweep

• [ ] Rollback changes to sweepai/utils/anthropic_client.py

This is an automated message generated by Sweep AI.

[d-walsh]

Apply Sweep Rules to your PR?

• [ ] Apply: We should use loguru for error logging. If the log is inside an exception, use logger.exception to add tracebacks, where logger is imported from loguru. Use f-strings for string formatting in logger calls (e.g. logger.info(f'Hello {name}') instead of logger.info('Hello {name}', name=name)).
• [ ] Apply: There should be no debug log or print statements in production code.
• [ ] Apply: All functions should have parameters and output annotated with type hints. Use list, tuple and dict instead of typing.List, typing.Tuple and typing.dict.
• [ ] Apply: Leftover TODOs in the code should be handled.
• [ ] Apply: All new business logic should have corresponding unit tests in the same directory. For example, sweepai/api_test.py tests sweepai/api.py. Use unittest and unittest.mock as required.
• [ ] Apply: Any clearly inefficient or repeated code should be optimized or refactored.
• [ ] Apply: Remove any comments before code that are obvious. For example # this prints hello world; print('hello world').

This is an automated message generated by Sweep AI.