GHA: Fix cirrus re-run workflow for other repos.
The checkout action by default, clones the current repository.  However,
since this workflow is re-used by other repos, and it calls scripts in
the podman repo, those calls will all fail.  Fix this by hard-coding the
podman repo.
Ref:
@@ -44,6 +44,9 @@ jobs:
steps:
- uses: actions/checkout@v3
with:
+ # All scripts used by this workflow live in podman repo.
+ repository: "containers/podman"
+ ref: "main"
persist-credentials: false
- name: Get failed cron names and Build IDs
