Update PR review template to add more detail on how to test the template

Update PR review template to add more detail on how to test the template:

- How to run locally (Update this section)
- How to deploy in an existing or a new environment (using the template deployment update the content to the content of the main branch)

> Please provide us with the following information:
> ---------------------------------------------------------------

### This issue is for a: (mark with an `x`)
```
- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [x] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Versions
> 1.1.0

### Mention any other details that might be useful

> ---------------------------------------------------------------
> Thanks! We'll be in touch soon.