Update docs link in reconciliation alert

The documentation that this alert used to refer to has been moved to
another location. Update the alert to point directly to the new
documentation so that the user does not have to follow the manual
redirect.

Issue: https://gitlab.com/gitlab-org/customers-gitlab-com/-/issues/3321

ee/app/assets/javascripts/billings/qrtly_reconciliation/constants.js

 import { helpPagePath } from '~/helpers/help_page_helper';
 import { s__, __ } from '~/locale';
 
-const qrtlyReconciliationHelpPageUrl = helpPagePath('subscriptions/self_managed/index', {
-  anchor: 'quarterly-subscription-reconciliation',
-});
+const qrtlyReconciliationHelpPageUrl = helpPagePath('subscriptions/quarterly_reconciliation');
 
 export const i18n = {
   title: s__('Admin|Quarterly reconciliation will occur on %{qrtlyDate}'),

ee/spec/frontend/billings/qrtly_reconciliation/components/qrtly_reconciliation_alert_spec.js

@@ -39,7 +39,7 @@ describe('Qrtly Reconciliation Alert', () => {
 
     it('has the correct link to the help page', () => {
       expect(findAlert().attributes('primarybuttonlink')).toBe(
-        '/help/subscriptions/self_managed/index#quarterly-subscription-reconciliation',
+        '/help/subscriptions/quarterly_reconciliation',
       );
     });