Update : ASP.NET Core tutorial typo (reactjs#1113)

Author: Zagoshipda

Diff for: site/jekyll/tutorials/aspnetcore.md

@@ -912,8 +912,8 @@ class CommentBox extends React.Component {
 	}
 	handleCommentSubmit(comment) {
 		const data = new FormData();
-		data.append('author', comment.author);
-		data.append('text', comment.text);
+		data.append('Author', comment.author);
+		data.append('Text', comment.text);
 
 		const xhr = new XMLHttpRequest();
 		xhr.open('post', this.props.submitUrl, true);