Typeshed-sync workflow: add appropriate labels, link directly to failing run (#15520)

Author: AlexWaygood

.github/workflows/sync_typeshed.yaml

@@ -78,5 +78,6 @@ jobs:
               owner: "astral-sh",
               repo: "ruff",
               title: `Automated typeshed sync failed on ${new Date().toDateString()}`,
-              body: "Runs are listed here: https://github.com/astral-sh/ruff/actions/workflows/sync_typeshed.yaml",
+              body: "Run listed here: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
+              labels: ["bug", "red-knot"],
             })