ci(github): reschedule CI to be run every day during the night (#528)

Just a kindness change to avoid overloading uselessly GitHub Actions runners during business hours.

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ on:
   pull_request:
     branches: [main, 'release/v*', next, next-major, beta, alpha]
   schedule:
-    - cron: '28 14 * * *' # At 14:28 every day
+    - cron: '5 4 * * *' # Every day at 04:05
 
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