typo in comment

Author: Dharmesh Kakadia <[email protected]>

Closes #8497 from dharmeshkakadia/patch-2.

(cherry picked from commit 71a077f)
Signed-off-by: Sean Owen <[email protected]>

Author: dharmeshkakadia

network/shuffle/src/main/java/org/apache/spark/network/shuffle/protocol/RegisterExecutor.java

@@ -27,7 +27,7 @@
 
 /**
  * Initial registration message between an executor and its local shuffle server.
- * Returns nothing (empty bye array).
+ * Returns nothing (empty byte array).
  */
 public class RegisterExecutor extends BlockTransferMessage {
   public final String appId;