rapid7#9108: fixed unit test

Author: dbfarrow

spec/lib/msf/ui/console/command_dispatcher/db_spec.rb

@@ -125,6 +125,7 @@
           "  -a,--add          Add the hosts instead of searching",
           "  -d,--delete       Delete the hosts instead of searching",
           "  -c <col1,col2>    Only show the given columns (see list below)",
+          "  -C <col1,col2>    Only show the given columns until the next restart (see list below)",
           "  -h,--help         Show this help information",
           "  -u,--up           Only show hosts which are up",
           "  -o <file>         Send output to a file in csv format",