Model hyperlink in README points to invalid page

[smcavey]

Describe the problem
The URL to the Model in the basic usage is outdated and doesn't point to any file.

How do you reproduce the problem?

1. Go to basic usage README
2. Select the "Model" hyperlink.

Expected behavior
The hyperlink should take me to the appropriate place in code. Possibly https://github.com/patternfly/react-topology/blob/main/packages/module/src/types.ts

What is your environment?

• OS: [Fedora 38]
• Browser [Firefox]