ci(renovate): remove Monday-only schedule so updates run continuously (#688)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: blove

renovate.json

@@ -6,7 +6,6 @@
     ":dependencyDashboard",
     ":semanticCommits"
   ],
-  "schedule": ["before 9am on monday"],
   "prConcurrentLimit": 5,
   "packageRules": [
     {