[Documentation] Google cloud project name

### Is your proposal related to a problem?

No

### Describe the solution you'd like

On the page `docs/docs/deployment/deployment-guides/google-kubernetes-engine-cloud-sql.mdx`

there is a section that says the below

```shell
gcloud projects create hasura
```

I would consider adding an info box (or what ever the equivalent in docasorus is) that you will need to manually chose a different one as all projects are globally unique.

Whilst this is a nothing burger of an issue, for uses who are just copy and pasting from the UI, they will get an error

### Describe alternatives you've considered

No alternaties, just a nice to have.

If there is a pre-exsting callout I can use and copy and paste, then I can fix this my self

Open docs/docs/deployment/deployment-guides/google-kubernetes-engine-cloud-sql.mdx and locate the `gcloud projects create hasura` example. First inspect the surrounding deployment instructions and any existing callout usage in the documentation. Done means the page explains that project names are globally unique and tells readers to choose an available name.

Written by the indexing model from the issue text.