Update doumentatation for import of custom rule nodes to ThingsBoard instance with instructions for Windows and other distributions.

[ShvaykaD]

This is a...

• [x] Feature Request
• [ ] Bug Report

Problem:

Original ticket: https://github.com/thingsboard/rule-node-examples/issues/23

Proposed Solution:

update Step 4. Import custom rule nodes to your ThingsBoard instance with instructions for Windows and other distributions.

Page to Update:

https://thingsboard.io/docs/user-guide/contribution/rule-node-development/