Updated renovate schedule

no issue

- To go through initial flood of PRs we want to have schedule changed just for the first week.
- This commit should be reverted next week

renovate.json

@@ -6,6 +6,7 @@
     "@tryghost:groupBuildTools",
     "@tryghost:automergeSilentTestLintNonMajor"
   ],
+  "schedule": "before 3am on Tuesday",
   "travis": { "enabled": true },
   "node": {
     "supportPolicy": ["lts"]