Use IOptionsMonitor to resolve OpenApiOptions

Author: captainsafia

src/OpenApi/src/Services/OpenApiDocumentProvider.cs

@@ -25,10 +25,8 @@ internal sealed class OpenApiDocumentProvider(IServiceProvider serviceProvider)
     /// <param name="writer">A text writer associated with the document to write to.</param>
     public async Task GenerateAsync(string documentName, TextWriter writer)
     {
-        // Resolving IOptionsSnapshot requires a scoped service provider.
-        using var scopedService = serviceProvider.CreateScope();
-        var optionsSnapshot = scopedService.ServiceProvider.GetRequiredService<IOptionsSnapshot<OpenApiOptions>>();
-        var namedOption = optionsSnapshot.Get(documentName);
+        var options = serviceProvider.GetRequiredService<IOptionsMonitor<OpenApiOptions>>();
+        var namedOption = options.Get(documentName);
         var resolvedOpenApiVersion = namedOption.OpenApiVersion;
         await GenerateAsync(documentName, writer, resolvedOpenApiVersion);
     }