docs: Add example of validation report

[isabelle-dr]

Summary:

This adds an example validation report in the project's README.

Expected behavior:

When the user clicks on the link, an example of the validation report appears.

Please make sure these boxes are checked before submitting your pull request - thanks!

• [ ] Run the unit tests with gradle test to make sure you didn't break anything
• Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• Linked all relevant issues
• Include screenshot(s) showing how this pull request works and fixes the issue(s)

[maximearmstrong]

LGTM 💯 Thank you @isabelle-dr