Update doc comment for DictionaryDecodingProducer

Author: martin-traverse

adapter/avro/src/main/java/org/apache/arrow/adapter/avro/producers/DictionaryDecodingProducer.java

@@ -22,8 +22,8 @@
 import org.apache.avro.io.Encoder;
 
 /**
- * Producer that produces decoded values from a dictionary-encoded {@link BaseIntVector}, writes
- * data to an Avro encoder.
+ * Producer that decodes values from a dictionary-encoded {@link FieldVector}, writes the resulting
+ * values to an Avro encoder.
  *
  * @param <T> Type of the underlying dictionary vector
  */