Fix comment

Author: nik9000

server/src/main/java/org/elasticsearch/index/mapper/blockloader/docvalues/MvMaxBytesRefsFromOrdsBlockLoader.java

@@ -16,7 +16,7 @@
 import java.io.IOException;
 
 /**
- * Loads {@code MV_MIN} applied to {@code keyword} style fields that are stored as
+ * Loads {@code MV_MAX} applied to {@code keyword} style fields that are stored as
  * a lookup table and ordinals.
  */
 public class MvMaxBytesRefsFromOrdsBlockLoader extends AbstractBytesRefsFromOrdsBlockLoader {