docs: update readme

Author: LordOfPolls

README.md

@@ -29,8 +29,8 @@ Examples:
 
 ```shell
 file_cat rs -r
-file_cat txt /path/to/directory
-file_cat js /path/to/directory -e node_modules,dist
+file_cat txt -p /path/to/directory
+file_cat js -p /path/to/directory -e node_modules,dist
 ```