Bump Microsoft.AspNetCore.OpenApi

Bumps the dotnet group in /docs/ai/how-to/snippets/hosted-app-auth with 1 update: [Microsoft.AspNetCore.OpenApi](https://github.com/dotnet/aspnetcore).


Updates `Microsoft.AspNetCore.OpenApi` from 9.0.3 to 9.0.4
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@v9.0.3...v9.0.4)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.OpenApi
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/ai/how-to/snippets/hosted-app-auth/hosted-app-auth.csproj

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Azure.AI.OpenAI" Version="2.1.0" />
     <PackageReference Include="Azure.Identity" Version="1.13.2" />
-    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.3" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.4" />
     <PackageReference Include="Microsoft.Extensions.AI" Version="9.3.0-preview.1.25161.3" />
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.3.0-preview.1.25161.3" />
     <PackageReference Include="Microsoft.Extensions.Azure" Version="1.11.0" />