change to cron schedule

Author: Tanner Reits

renovate.json5

@@ -56,9 +56,11 @@
   // Never rebase the branch or update it unless manually requested to avoid noisy PR emails
   rebaseWhen: 'never',
   /**
-   * Natural language syntax taken directly from renovate preset examples (with time adjusted).
+   * 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: ["before 8am on the first day of the month"],
+  schedule: ["* 0 1 * *"],
   /**
    * Ensure semantic commits are enabled for commits + PR titles.
    *