update makefile for new repo

[KevinLuong96]

make reset-db command fails on new toolkit repo structure.

Thank you for contributing to the Cohere Toolkit!

• PR title: "area: description"

  • Where "area" is whichever of interface, frontend, model, tools, backend, etc. is being modified. Use "docs: ..." for purely docs changes, "infra: ..." for CI changes.
  • Example: "deployment: add Azure model option"

• PR message: Delete this entire checklist and replace with

  • Description: a description of the change
  • Issue: the issue # it fixes, if applicable
  • Dependencies: any dependencies required for this change

• Add tests and docs: Please include testing and documentation for your changes

• Lint and test: Run make lint and make test