Docs: Add note about jj edit to Git comparison

[bnjmnt4n]

Checklist

If applicable:

• I have updated CHANGELOG.md
• I have updated the documentation (README.md, docs/, demos/)
• I have updated the config schema (cli/src/config-schema.json)
• I have added tests to cover my changes

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[martinvonz]

I know this is marked as a draft, but it already looks good to me

[bnjmnt4n]

I've signed the CLA with this email and my GitHub username, clicking the rescan gives me an error 400.

[martinvonz]

I've signed the CLA with this email and my GitHub username, clicking the rescan gives me an error 400.

The check passed now anyway. I have sometimes had to go to an internal page to force a re-scan, but that wasn't necessary this time.

I've also invited you as a contributor so you can merge PRs yourself once you have approval.

[bnjmnt4n]

I've also invited you as a contributor so you can merge PRs yourself once you have approval.

Thanks! Will being seeing what else I can contribute to!

[PhilipMetzger]

FYI, I re-ran the check yesterday so there was no action required :-).