ci: use the shared scheduled-failure report (#158)

Author: lesnik512

.github/scripts/report-scheduled-failure.sh

@@ -15,14 +15,6 @@ jobs:
   report-failure:
     needs: checks
     if: failure() && github.event_name == 'schedule'
-    runs-on: ubuntu-latest
     permissions:
-      contents: read
       issues: write
-    steps:
-      - uses: actions/checkout@v6
-      - name: Open or update tracking issue
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-        run: bash .github/scripts/report-scheduled-failure.sh
+    uses: modern-python/.github/.github/workflows/report-scheduled-failure.yml@main