rename to @Index.maxValueLength

Author: greenrobot

objectbox-java-api/src/main/java/io/objectbox/annotation/Index.java

@@ -30,7 +30,7 @@
     IndexType type() default IndexType.DEFAULT;
 
     /** Only allowed for {@link IndexType#VALUE} and types String and byte[]. */
-    int maxLength() default 0;
+    int maxValueLength() default 0;
 
 //    /**
 //     * Whether the unique constraint should be created with base on this index