adjust Javadoc in deserializer to remove warning

dataformat-json/src/main/java/org/eclipse/digitaltwin/aas4j/v3/dataformat/json/ReferableDeserializer.java

@@ -117,7 +117,7 @@ default <T extends Referable> T readReferable(File src, Charset charset, Class<T
      * @param outputClass most specific class of the given Referable
      * @param <T> type of the returned element
      * @return an instance of a list of the referables
-     * @throws DeserializationException
+     * @throws DeserializationException if deserialization of referable fails
      */
     <T extends Referable> List<T> readReferables(String referables, Class<T> outputClass) throws DeserializationException;