Add parameter comment

This makes information contained in
b1cc663's message more easily
accessible.

Author: findepi

plugin/trino-hive/src/main/java/io/trino/plugin/hive/util/InternalHiveSplitFactory.java

@@ -148,6 +148,7 @@ private Optional<InternalHiveSplit> createInternalHiveSplit(
             BlockLocation[] blockLocations,
             long start,
             long length,
+            // Estimated because, for example, encrypted S3 files may be padded, so reported size may not reflect actual size
             long estimatedFileSize,
             long fileModificationTime,
             OptionalInt bucketNumber,