Update TLS example with verbose flag

[kasemir]

PVXS commands like authnstd now require -v to log the generated certificate IDs, so include them in the example

Checklist

• Testing:

  • I tested by reading the preview of the documentation that it now includes the desired -v option.

• Documentation:

  • The feature is documented
  • The documentation is up to date because it reflects the current behavior of PVXS command line tools