security/py-netmiko: Update to 4.1.1

* Add the additional category "net-mgmt" as the port is also related
  to network automation/management.

* Make it concurrent safe as well because some scripts are installed
  outside of Python's site-lib directory since the 4.0.0 release.

Changelog since 3.4.0

https://github.com/ktbyers/netmiko/releases/tag/v4.1.1
https://github.com/ktbyers/netmiko/releases/tag/v4.1.0
https://github.com/ktbyers/netmiko/releases/tag/v4.0.0

MFH:		No (feature release, backwards incompatible changes)