Full check 6 (rerun-io#5953)

### What

I'm getting "ref not found" errors, which may be because of the `/` in
the branch name. Using a fully qualified ref instead

### Checklist
* [ ] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [ ] I've included a screenshot or gif (if applicable)
* [ ] I have tested the web demo (if applicable):
* Using examples from latest `main` build:
[rerun.io/viewer](https://rerun.io/viewer/pr/{{pr.number}}?manifest_url=https://app.rerun.io/version/main/examples_manifest.json)
* Using full set of examples from `nightly` build:
[rerun.io/viewer](https://rerun.io/viewer/pr/{{pr.number}}?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json)
* [ ] The PR title and labels are set such as to maximize their
usefulness for the next release's CHANGELOG
* [ ] If applicable, add a new check to the [release
checklist](https://github.com/rerun-io/rerun/blob/main/tests/python/release_checklist)!

- [PR Build Summary](https://build.rerun.io/pr/{{ pr.number }})
- [Recent benchmark results](https://build.rerun.io/graphs/crates.html)
- [Wasm size tracking](https://build.rerun.io/graphs/sizes.html)

To run all checks from `main`, comment on the PR with `@rerun-bot
full-check`.

.github/workflows/on_pr_comment.yml

@@ -67,7 +67,7 @@ jobs:
             local workflow_name=$1
             local ref_name=$2
             # https://cli.github.com/manual/gh_workflow_run
-            gh workflow run $workflow_name --ref $ref_name
+            gh workflow run $workflow_name --ref "refs/heads/$ref_name"
           }
 
           workflow_name='on_push_main.yml'