v0.27.0 - Support for new OpenAI models; dependency security update

What's Changed

• Adding new openai 4o-mini model by @bricemacias in #352
• chore: Add gpt-4o-2024-08-06 support by @paul-paliychuk in #353
• Bump github.com/hashicorp/go-retryablehttp from 0.7.4 to 0.7.7 by @dependabot in #349

New Contributors

• @bricemacias made their first contribution in #352
• @paul-paliychuk made their first contribution in #353

Full Changelog: v0.26.0...v0.27.0