fix: xml case to be consistent

Author: ugocottin

Sources/_OpenAPIGeneratorCore/Translator/Content/ContentInspector.swift

@@ -130,7 +130,7 @@ extension FileTranslator {
         let mapWithContentTypes = try map.map { key, content in try (type: key.asGeneratorContentType, value: content) }
 
         let chosenContent: (type: ContentType, schema: SchemaContent, content: OpenAPI.Content)?
-        if let (contentType, contentValue) = mapWithContentTypes.first(where: { $0.type.isJSON || $0.type.isXml }) {
+        if let (contentType, contentValue) = mapWithContentTypes.first(where: { $0.type.isJSON || $0.type.isXML }) {
             chosenContent = (contentType, .init(contentType: contentType, schema: contentValue.schema), contentValue)
         } else if !excludeBinary,
             let (contentType, contentValue) = mapWithContentTypes.first(where: { $0.type.isBinary })
@@ -192,7 +192,7 @@ extension FileTranslator {
             )
         }
         if contentType.isJSON { return .init(contentType: contentType, schema: contentValue.schema) }
-        if contentType.isXml { return .init(contentType: contentType, schema: contentValue.schema) }
+        if contentType.isXML { return .init(contentType: contentType, schema: contentValue.schema) }
         if contentType.isUrlEncodedForm { return .init(contentType: contentType, schema: contentValue.schema) }
         if contentType.isMultipart {
             guard isRequired else {

Sources/_OpenAPIGeneratorCore/Translator/Content/ContentType.swift

@@ -224,9 +224,10 @@ struct ContentType: Hashable {
     /// A Boolean value that indicates whether the content type
     /// is a multipart form.
     var isMultipart: Bool { category == .multipart }
+
     /// A Boolean value that indicates whether the content type
     /// is a type of XML.
-    var isXml: Bool { category == .xml }
+    var isXML: Bool { category == .xml }
 
     /// The content type `text/plain`.
     static var textPlain: Self { try! .init(string: "text/plain") }