chore(renovate): lower update frequency

renovate.json5

@@ -47,8 +47,12 @@
   ],
   // Never rebase the branch or update it unless manually requested to avoid noisy PR emails
   rebaseWhen: 'never',
-  // Note: Timezone for the schedule is specified as UTC
-  schedule: ['every weekday before 11am'],
+  /**
+   * Cron syntax to run at midnight (UTC) on the first day of every month
+   * 
+   * Note: Renovate does not support minute value granularity, so the wildcard value is necessary
+   */
+  schedule: ["* 0 1 * *"],
   /**
    * Ensure semantic commits are enabled for commits + PR titles.
    *