unable to change app service plan on consumption linux function

### **This is autogenerated. Please review and update as needed.**

## Describe the bug

**Command Name**
`az functionapp update`

**Errors:**
```
(--resource-group | --ids) are required
```

## To Reproduce:
Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

- _Put any pre-requisite steps here..._
- `az functionapp update --name {} --plan {}`

## Expected Behavior

## Environment Summary
```
Linux-4.15.0-1106-azure-x86_64-with-debian-10.2 (Cloud Shell)
Python 3.6.10
Installer: DEB

azure-cli 2.19.0 *

Extensions:
application-insights 0.1.7
ai-examples 0.2.5

```
## Additional Context