fix: corrected the switch doc line

Author: atsareg

src/DIRAC/DataManagementSystem/scripts/dirac_dms_filecatalog_cli.py

@@ -28,7 +28,7 @@
 def main():
     fcType = None
     catalog = None
-    Script.registerSwitch("f:", "file-catalog=", f"   Catalog client type to use (default {fcType})")
+    Script.registerSwitch("f:", "file-catalog=", f"   Catalog to use (default - Catalog defined for the users' VO)")
     Script.parseCommandLine(ignoreErrors=False)
 
     from DIRAC import exit as dexit