Clean up

Author: MaggieKimani1

src/Microsoft.OpenApi/Models/OpenApiSchema.cs

@@ -563,7 +563,7 @@ public void SerializeInternal(IOpenApiWriter writer, OpenApiSpecVersion version,
             // Unrecognized keywords
             if (UnrecognizedKeywords.Any())
             {
-                writer.WriteOptionalMap(OpenApiConstants.UnrecognizedProperties, UnrecognizedKeywords, (w,s) => w.WriteAny(s));
+                writer.WriteOptionalMap(OpenApiConstants.UnrecognizedKeywords, UnrecognizedKeywords, (w,s) => w.WriteAny(s));
             }
 
             writer.WriteEndObject();

test/Microsoft.OpenApi.Tests/Models/OpenApiSchemaTests.cs

@@ -617,7 +617,7 @@ public void SerializeSchemaWithUnrecognizedPropertiesWorks()
             };
 
             var expected = @"{
-  ""unrecognizedProperties"": {
+  ""unrecognizedKeywords"": {
     ""customKeyWord"": ""bar"",
     ""anotherKeyword"": 42
   }