chore: fix generate command on templates' README

[gianalarcon]

Description

Following base template readme

Command npm run generate not found

Fixes # (issue)

Fixed to use right command: npm run prebuild

How Has This Been Tested?

Manually tested

Checklist:

• [x] The title of this PR complies with Conventional Commits.
• [ ] I have edited the CHANGELOG accordingly.
• [x] I have made corresponding changes to the documentation.