fix: removes virtual modifier in MediaType

Signed-off-by: Vincent Biret <[email protected]>

Author: baywet

src/Microsoft.OpenApi/Models/OpenApiMediaType.cs

@@ -22,7 +22,7 @@ public class OpenApiMediaType : IOpenApiSerializable, IOpenApiExtensible
         /// <summary>
         /// The schema defining the type used for the request body.
         /// </summary>
-        public virtual IOpenApiSchema? Schema { get; set; }
+        public IOpenApiSchema? Schema { get; set; }
 
         /// <summary>
         /// Example of the media type.

test/Microsoft.OpenApi.Tests/PublicApi/PublicApi.approved.txt

@@ -843,7 +843,7 @@ namespace Microsoft.OpenApi.Models
         public System.Text.Json.Nodes.JsonNode? Example { get; set; }
         public System.Collections.Generic.IDictionary<string, Microsoft.OpenApi.Models.Interfaces.IOpenApiExample>? Examples { get; set; }
         public System.Collections.Generic.IDictionary<string, Microsoft.OpenApi.Interfaces.IOpenApiExtension>? Extensions { get; set; }
-        public virtual Microsoft.OpenApi.Models.Interfaces.IOpenApiSchema? Schema { get; set; }
+        public Microsoft.OpenApi.Models.Interfaces.IOpenApiSchema? Schema { get; set; }
         public void SerializeAsV2(Microsoft.OpenApi.Writers.IOpenApiWriter writer) { }
         public void SerializeAsV3(Microsoft.OpenApi.Writers.IOpenApiWriter writer) { }
         public void SerializeAsV31(Microsoft.OpenApi.Writers.IOpenApiWriter writer) { }