Update src/Microsoft.OpenApi/Models/OpenApiMediaType.cs

Co-authored-by: Andrew Omondi <andrueastman@users.noreply.github.com>

src/Microsoft.OpenApi/Models/OpenApiMediaType.cs

@@ -109,7 +109,7 @@ private void SerializeExamples(IOpenApiWriter writer, IDictionary<string, OpenAp
             {
                 writer.WritePropertyName(OpenApiConstants.Examples);
                 writer.WriteStartObject();
-                foreach (var kvp in examples.Where(kvp => kvp.Value.Value is OpenApiArray arr && arr.Count == 0))
+                foreach (var kvp in examples.Where(static kvp => kvp.Value.Value is OpenApiArray arr && arr.Count == 0))
                 {
                     writer.WritePropertyName(kvp.Key);
                     writer.WriteStartObject();