Update key cause infinity render with suspense mode

# Bug report

## Description / Observed Behavior

https://user-images.githubusercontent.com/11076888/152347770-e2f5fa49-f8f2-4b98-a74c-758a0a173f2a.mov

## Repro Steps / Code Example

https://codesandbox.io/s/swr-suspense-infinite-render-0rkuq?file=/src/index.js

## Additional Context

swr 1.2.1
react 18

Thanks to @land47 for the original repro.
