Bump the dotnet group (#44660)

Bumps the dotnet group in /docs/ai/quickstarts/snippets/assistants with 3 updates: [Azure.AI.OpenAI](https://github.com/Azure/azure-sdk-for-net), [OpenAI](https://github.com/openai/openai-dotnet) and [Azure.Identity](https://github.com/Azure/azure-sdk-for-net).


Updates `Azure.AI.OpenAI` from 2.1.0-beta.2 to 2.1.0
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.AI.OpenAI_2.1.0-beta.2...Azure.AI.OpenAI_2.1.0)

Updates `OpenAI` from 2.1.0 to 2.1.0
- [Release notes](https://github.com/openai/openai-dotnet/releases)
- [Changelog](https://github.com/openai/openai-dotnet/blob/main/CHANGELOG.md)
- [Commits](openai/openai-dotnet@OpenAI_2.1.0...OpenAI_2.1.0)

Updates `Azure.Identity` from 1.13.1 to 1.13.2
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.Identity_1.13.1...Azure.Identity_1.13.2)

---
updated-dependencies:
- dependency-name: Azure.AI.OpenAI
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
- dependency-name: OpenAI
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
- dependency-name: Azure.Identity
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/ai/quickstarts/snippets/assistants/AIAssistants.csproj

@@ -8,8 +8,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Azure.AI.OpenAI" Version="2.1.0-beta.2" />
-    <PackageReference Include="Azure.Identity" Version="1.13.1" />
+    <PackageReference Include="Azure.AI.OpenAI" Version="2.1.0" />
+    <PackageReference Include="Azure.Identity" Version="1.13.2" />
     <PackageReference Include="OpenAI" Version="2.1.0" />
   </ItemGroup>