docs: Add side effect from using setQueryData (TanStack#2691)

Author: pawlarius

docs/src/pages/reference/QueryClient.md

@@ -205,6 +205,8 @@ This distinction is more a "convenience" for ts devs that know which structure w
 
 `setQueryData` is a synchronous function that can be used to immediately update a query's cached data. If the query does not exist, it will be created. **If the query is not utilized by a query hook in the default `cacheTime` of 5 minutes, the query will be garbage collected**.
 
+After successful changing query's cached data via `setQueryData`, it will also trigger `onSuccess` callback from that query.
+
 > The difference between using `setQueryData` and `fetchQuery` is that `setQueryData` is sync and assumes that you already synchronously have the data available. If you need to fetch the data asynchronously, it's suggested that you either refetch the query key or use `fetchQuery` to handle the asynchronous fetch.
 
 ```js