Added renovate schedule to match automergeSchedule (#1510)

closes https://linear.app/ghost/issue/BER-3221

- Currently only PRs that are created during the `automergeScheduled`
are merged. This change aligns the PR creation with the allowed
automerge schedule.

Author: rmgpinto

.github/renovate.json5

@@ -14,6 +14,7 @@
   // - this doesn't restrict when the PRs are opened by Renovate, only when they are merged
   // - this works only if we're using Renovate automerge over platform automerge (Github)
   "platformAutomerge": false,
+  "schedule": ["* 8-11 * * 1,2,3,4"],
   "automergeSchedule": ["* 8-11 * * 1,2,3,4"],
   // Automerge lock file updates, whenever available
   // Note: the base config file has this enabled, but on a weekly basis only