Avoid result-less GH Action by increasing interval

Author: Cathryne

.github/workflows/all-countries.yml

@@ -4,7 +4,7 @@ on:  # yamllint disable-line rule:truthy
   push:
     branches: [main]
   schedule:
-    - cron: '57 09 * * *'
+    - cron: '57 09 */3 * *'
 
 jobs:
   build: