OpenAI_2.0.0-beta.13

What's Changed

• Add serialization/deserialization example with chat completions by @joseharriaga in https://github.com/openai/openai-dotnet/pull/124
• Refactor and rename types and properties for consistency and clarity by @ShivangiReja in https://github.com/openai/openai-dotnet/pull/225
• Remove the virtual keyword from the Pipeline property across all clients by @ShivangiReja in https://github.com/openai/openai-dotnet/pull/227
• Prepare 2.0.0-beta.13 release (Part 1) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/229
• [Examples] Updating orange picture links by @kinelski in https://github.com/openai/openai-dotnet/pull/231
• Prepare 2.0.0-beta.13 release (Part 2) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/230

Full Changelog: https://github.com/openai/openai-dotnet/compare/OpenAI_2.0.0-beta.12...OpenAI_2.0.0-beta.13