tests(urls): Add schedule and cancel running jobs

Author: LukeSavefrogs

.github/workflows/test-urls.yml

@@ -3,6 +3,13 @@ name: "Source download URLs status"
 on:
   push:
   pull_request:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *"
+
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: true
 
 jobs:
   check-urls: