chore: fix release workflow dispatch repo resolution

[zeitlinger]

What changed

Pass --repo "${GITHUB_REPOSITORY}" to the gh workflow run release.yml call in release-please.yml.

Why

The Release Please workflow dispatch step runs without a checkout, so gh cannot infer the repository from .git. The failed run for v1.6.0 stopped with fatal: not a git repository before release.yml was dispatched.

Impact

This allows the existing release workflow to be triggered from the Release Please job without adding an unnecessary checkout step.

Validation

• Inspected the failing Actions job 73146303246 and confirmed the dispatch step was the failure point.
• Verified comparable repositories commonly pass --repo explicitly when dispatching workflows from Actions.
• Ran mise run lint locally.

Follow-up

After this lands, release.yml can be manually dispatched with tag=v1.6.0 to publish the existing tag.