correct the link field customer/company

It is valid to have a company field. The customer is not really needed, what we will want here is the IT Landscap. Customer could be optional though, but this is also a dependency to ERPNext and should only be used when that is installed
<img width="1531" height="597" alt="Image" src="https://github.com/user-attachments/assets/031ec9b7-f041-42ea-a715-82b1ea0ebce7" />

