Fix typo

rskj-core/src/main/java/co/rsk/peg/bitcoin/BitcoinUtils.java

@@ -16,7 +16,7 @@
 public class BitcoinUtils {
     protected static final byte[]  WITNESS_COMMITMENT_HEADER = Hex.decode("aa21a9ed");
     protected static final int WITNESS_COMMITMENT_LENGTH = WITNESS_COMMITMENT_HEADER.length + Sha256Hash.LENGTH;
-    private static final int MINIMUM_WITNESS_COMMITMENT_SIZE = WITNESS_COMMITMENT_LENGTH + 2; // 1 extra by for OP_RETURN and another one for data length
+    private static final int MINIMUM_WITNESS_COMMITMENT_SIZE = WITNESS_COMMITMENT_LENGTH + 2; // 1 extra byte for OP_RETURN and another one for data length
     private static final Logger logger = LoggerFactory.getLogger(BitcoinUtils.class);
     private static final int FIRST_INPUT_INDEX = 0;