Update link to example usage of docker builder by Oak Project

[thompson-shaun]

docs: update link to Oak Project workflow file

Summary

Update link to example workflow usage by Oak Project in README.md

Testing Process

Visually verified change and followed updated link

Checklist

• [x] Review the contributing guidelines
• [ ] Add a reference to related issues in the PR description.
• [x] Update documentation if applicable.
• [ ] Add unit tests if applicable.
• [ ] Add changes to the CHANGELOG if applicable.