ci(update-codeowners-from-packages): add build label

[xmfcx]

Description

When this workflow tenerates a PR, we need to add the label manually to make it pass the CI.

This PR automates that.

How was this PR tested?

I will test with manual dispatch on the sync-files change to see if sd command works as expected.

• ✅ ci(update-codeowners-from-packages): add build label #212 (comment)

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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[xmfcx]

• generated correctly: https://github.com/autowarefoundation/autoware.core/pull/213/files

I will include it in this PR.

[youtalk]

If the bots don’t commit frequently, I think it’s a good fix. Let’s merge it for now, and if any issues arise, we can reconsider then.

[xmfcx]

Thanks, this workflow runs once a day. And if there are no code owner changes, it doesn't create a PR.

So it shouldn't cause a problem on that end.

[xmfcx]

Also the build-and-test differential job checks if any package is modified. And if no package is modified, it skips the checks.

Since this workflow only modifies the .github folder, the check will always be empty.

Maybe we can move this check outside the job itself to make it skip it earlier. Because right now, it will wait for pulling the image and waste time.