fix --cellbarcode error

src/sscocaller.nim

@@ -466,7 +466,7 @@ Options:
   if($args["--threads"] != "nil"):
       threads = parse_int($args["--threads"])
   if($args["--cellbarcode"] != "nil"):
-      barcodeTag = $args["--barcodeTag"]
+      barcodeTag = $args["--cellbarcode"]
   else: threads = 4
   if($args["--minDP"] != "nil"):
       mindp = parse_int($args["--minDP"])