refactor: disable vulnerability alerts and automerge due to lack of required permissions

GitHub's vulnerability alert feature and automerge are turned off as the necessary permissions are not granted in this context.

Author: alan-agius4

renovate-presets/default.json5

@@ -3,6 +3,7 @@
   extends: ['group:monorepos'],
   dependencyDashboard: true,
   rangeStrategy: 'replace',
+  automerge: false,
 
   // Schedule Renovate to run during off-peak hours
   schedule: ['after 10:00pm every weekday', 'before 5:00am every weekday', 'every weekend'],
@@ -21,6 +22,11 @@
     enabled: true,
   },
 
+  // Feature disabled: permission to enable vulnerability alerts is not granted
+  'vulnerabilityAlerts': {
+    'enabled': false,
+  },
+
   // Ignored dependencies in all repositories
   ignoreDeps: [
     'build_bazel_rules_nodejs',