Javadoc mistake (#1092)

Fix documentation of type of exception thrown by byteAt.
diff --git a/modules/api/src/main/java/org/apache/fluo/api/data/Bytes.java b/modules/api/src/main/java/org/apache/fluo/api/data/Bytes.java
index f90fe3d..ad0d784 100644
--- a/modules/api/src/main/java/org/apache/fluo/api/data/Bytes.java
+++ b/modules/api/src/main/java/org/apache/fluo/api/data/Bytes.java
@@ -98,7 +98,7 @@
    *
    * @param i index into sequence
    * @return byte
-   * @throws IllegalArgumentException if i is out of range
+   * @throws IndexOutOfBoundsException if i is out of range
    */
   public byte byteAt(int i) {