Summary

Install Devbox in multiple README files points to https://www.jetify.com/docs/devbox/installing_devbox which throws a 404 error.
This PR fix the broken links and updates with the new ones.

How was it tested?

Looking and following the links that were broken

Community Contribution License

All community contributions in this pull request are licensed to the project
maintainers under the terms of the
Apache 2 License.

By creating this pull request, I represent that I have the right to license the
contributions to the project maintainers under the Apache 2 License as stated in
the
Community Contribution License.