doc: fga tuple delete --file=(csv|json|yaml) now supports CSV (#1004)

Co-authored-by: Raghd Hamzeh <raghd.hamzeh@openfga.dev>

Author: bensooraj

docs/content/getting-started/cli.mdx

@@ -327,7 +327,7 @@ When using the CSV format, you can omit certain headers, and you don’t need to
 
 ## Delete Tuples
 
-To delete a tuple, specify the user/relation/object you want to delete. To delete a group of tuples, specify a file that contains those tuples.
+To delete a tuple, specify the user/relation/object you want to delete. To delete a group of tuples, specify a file that contains those tuples. Supported file formats are `json`, `yaml` and `csv`.
 
 ```bash
 $ fga tuple delete --file tuples.yaml