Fix billing pipeline first month scheduling (#1891)

* Fix billing pipeline first month scheduling

* compare to expansion next month

* use yoda date comparison

* update cursor time to be mid of day

core/src/main/java/google/registry/reporting/billing/GenerateInvoicesAction.java

@@ -120,7 +120,7 @@ public class GenerateInvoicesAction implements Runnable {
                           .orElse(Cursor.createGlobal(RECURRING_BILLING, START_OF_TIME))
                           .getCursorTime());
 
-      if (yearMonth.getMonthOfYear() >= currentCursorTime.getMonthOfYear()) {
+      if (!YearMonth.fromDateFields(currentCursorTime.toDate()).isAfter(yearMonth)) {
         throw new IllegalStateException(
             "Latest billing events expansion cycle hasn't finished yet, terminating invoicing"
                 + " pipeline");