Update README.md

README.md

@@ -29,7 +29,7 @@ A style of an artwork refers to its distinctive visual elements, techniques and
 
 * "image" : image
 * "artist" : 129 artist classes, including a "Unknown Artist" class
-* "genre" : 10 genre classes, including a "Unknown Genre" class
+* "genre" : 11 genre classes, including a "Unknown Genre" class
 * "style" : 27 style classes
 
 ### Source Data