test(angular-query-persist-client): use the '.then()' convention consistently (#11088)

Author: sukvvon

packages/angular-query-persist-client/src/__tests__/with-persist-query-client.test.ts

@@ -279,11 +279,11 @@ describe('withPersistQueryClient', () => {
     class Page {
       state = injectQuery(() => ({
         queryKey: key,
-        queryFn: async () => {
-          await sleep(10)
-          fetched = true
-          return 'fetched'
-        },
+        queryFn: () =>
+          sleep(10).then(() => {
+            fetched = true
+            return 'fetched'
+          }),
         staleTime: Infinity,
       }))