Update stack_gcp_service_account.md

[jzck]

Description of the change

This part of the documentation was out of date. (see error message below).

Type of change

• [ ] Bug fix (non-breaking change that fixes an issue)
• [ ] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation (non-breaking change that adds documentation)

Development

│ [
│   {
│     "@type": "type.googleapis.com/google.rpc.BadRequest",
│     "fieldViolations": [
│       {
│         "description": "Policy members must be prefixed of the form 'type:value', where type is 'domain', 'group', 'serviceAccount', or 'user'.",
│         "field": "policy.bindings.member"
│       }
│     ]
│   },
│   {
│     "@type": "type.googleapis.com/google.rpc.ErrorInfo",
│     "domain": "cloudresourcemanager.googleapis.com",
│     "reason": "PROJECT_SET_IAM_DISALLOWED_MEMBER_TYPE"
│   },
│   {
│     "@type": "type.googleapis.com/google.rpc.ResourceInfo",
│     "resourceName": "projects/alg-foundation"
│   }
│ ]

Code review

• [x] This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• [x] Pull Request is no longer marked as "draft"
• [ ] Reviewers have been assigned
• [ ] Changes have been reviewed by at least one other engineer
• [x] The target branch is future unless the change is going directly into production

[marcinwyszynski]

Hey! Thanks for bringing it to our attention!

The docs are autogenerated using this tool so the required change is subtly different, but no need to resubmit the PR, we'll take it from here.

[jzck]

we'll take it from here.

Ok thanks, feel free to close this PR whenever.

[marcinwyszynski]

This has been released in 0.1.11.