docs: update models README references

[ginglis13]

Issue number:

n/a

Description of changes:

update references in the models readme to their new locations.

cargo readme > README.md

Testing done:

n/a

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[ginglis13]

Cancelling CI since this is just a documentation change.

[ginglis13]

^ rebase