Update README.md

README.md

@@ -9,4 +9,4 @@ size_categories:
 
 # [doc] format - tsv - 2
 
-This dataset contains one csv file at the root. We define the separator as `\t` (tabulation) in the YAML config.
+This dataset contains one tsv file at the root. We define the separator as `\t` (tabulation) in the YAML config.