#2021-05-13-20:30:00+0800 adjust cloudchat idle tidb machine type

- Cause: Upgrade idle tidb [machine type](https://github.com/tidbcloud/ops-trail/blob/main/trails/2021-04-25-14:04:20%2B0800-vertical_scaling_tidb-server_to_c5.9xlarge.md)
- Operation: execute the following commands

```
kubectl edit shoot 4bc76ea -n garden-prod //replace c5.2xlarge with c5.4xlarge
   labels:

     gardener.node.machine.type: c5.4xlarge
   machine:
     type: c5.4xlarge  			 
```

- Impact: No
- Recovery operation: No

- Time window: 08:00 PM, 2021 May 13 ~ 08:10 PM, 2021 May 13