Add missing javadoc

Signed-off-by: xil <[email protected]>

Author: lucy66hw

modules/transport-grpc/src/main/java/org/opensearch/transport/grpc/proto/request/search/query/MatchPhrasePrefixQueryBuilderProtoConverter.java

@@ -17,7 +17,9 @@
  * into an OpenSearch QueryBuilder object for search operations.
  */
 public class MatchPhrasePrefixQueryBuilderProtoConverter implements QueryBuilderProtoConverter {
-
+    /**
+     * Constructs a new MatchPhrasePrefixQueryBuilderProtoConverter.
+     */
     public MatchPhrasePrefixQueryBuilderProtoConverter() {
         // Default constructor
     }