fixed typo

src/dorkbox/bytes/Hex.kt

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 dorkbox, llc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 /*
  * MIT License
  *
@@ -79,7 +95,7 @@ object Hex {
      * @throws IllegalArgumentException if the value is not a hexadecimal string.
      */
     fun decode(value: String): ByteArray {
-        // An hex string must always have length multiple of 2
+        // A hex string must always have length multiple of 2
         if (value.length % 2 != 0) {
             throw IllegalArgumentException("hex-string must have an even number of digits (nibbles)")
         }