[Synthetics TLS certificate] Fix error when opening rule flyout (elas…

…tic#202386)

Fixes elastic#188828

x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/components/alerts/tls_rule_ui.tsx

@@ -9,8 +9,7 @@ import { useDispatch, useSelector } from 'react-redux';
 import React, { useEffect } from 'react';
 import { RuleTypeParamsExpressionProps } from '@kbn/triggers-actions-ui-plugin/public';
 import { AlertTlsComponent } from './alert_tls';
-import { getDynamicSettings } from '../../state/settings/api';
-import { selectDynamicSettings } from '../../state/settings';
+import { getDynamicSettingsAction, selectDynamicSettings } from '../../state/settings';
 import { TLSParams } from '../../../../../common/runtime_types/alerts/tls';
 import { DYNAMIC_SETTINGS_DEFAULTS } from '../../../../../common/constants';
 
@@ -24,7 +23,7 @@ export const TLSRuleComponent: React.FC<{
 
   useEffect(() => {
     if (typeof settings === 'undefined') {
-      dispatch(getDynamicSettings());
+      dispatch(getDynamicSettingsAction.get());
     }
   }, [dispatch, settings]);