🐛(renovate) fix renovate

Fix renovate configuration:
- schedule at 7am the monday
- avoid wiping manual fixes unless needed
- only create during schedule

Author: AntoLC

renovate.json

@@ -2,6 +2,10 @@
   "extends": ["github>numerique-gouv/renovate-configuration"],
   "dependencyDashboard": true,
   "labels": ["dependencies", "noChangeLog", "automated"],
+  "schedule": ["before 7am on monday"],
+  "prCreation": "not-pending",
+  "rebaseWhen": "conflicted",
+  "updateNotScheduled": false,
   "packageRules": [
     {
       "enabled": false,