OpenAI_2.0.0-beta.12

What's Changed

• Added the NuGet tags openai-dotnet, ChatGPT, and Dall-E by @AngelosP in https://github.com/openai/openai-dotnet/pull/173
• Prepare 2.0.0-beta.12 release (Part 1) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/216
• Prepare 2.0.0-beta.12 release (Part 2) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/220
• Prepare 2.0.0-beta.12 release (Part 3) by @joseharriaga in https://github.com/openai/openai-dotnet/pull/221

Full Changelog: https://github.com/openai/openai-dotnet/compare/OpenAI_2.0.0-beta.11...OpenAI_2.0.0-beta.12