update help command

src/main.rs

···
          yap [-COMMAND] [PATH_TO_FILE] 
 
          -c, --bytes - count the amount of bytes in a file
+         -l, --lines - count the amount of lines in a file
+         -w, --words - count the amount of words in a file
          -m, --chars - count the amount of characters in a file
          -h, --help - list the available command line arguments
         "