OpenAI_2.2.0-beta.4

What's Changed

• Add a few quick readme examples for new responses support by @trrwilson in https://github.com/openai/openai-dotnet/pull/371
• Prepare 2.2.0-beta.4 release (Part 1) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/378
• Prepare 2.2.0-beta.4 release (Part 2) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/379
• Prepare 2.2.0-beta.4 release (Part 3) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/380

Full Changelog: https://github.com/openai/openai-dotnet/compare/OpenAI_2.2.0-beta.3...OpenAI_2.2.0-beta.4