docs: correct comment (#553)

Author: NuthanReddy

samples/snippets/src/main/java/com/example/bigquery/LoadCsvFromGcs.java

@@ -45,7 +45,7 @@ public static void loadCsvFromGcs(String datasetName, String tableName, String s
       Table table = bigquery.getTable(datasetName, tableName);
       Job loadJob = table.load(FormatOptions.csv(), sourceUri);
 
-      // Load data from a GCS parquet file into the table
+      // Load data from a GCS CSV file into the table
       // Blocks until this load table job completes its execution, either failing or succeeding.
       Job completedJob = loadJob.waitFor();