fix: project_id need to be updated when Project.project_id is actually a project_number

[shanwei8]

_connection.api_request(method="GET", path=f'/projects/{project_id}')
project_id here could be project number, and if you check Project('{project_id}').exists(), it will be True becasue api accept it.
When that happens, project_id should be updated too.

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Fixes #<issue_number_goes_here> 🦕

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[shanwei8]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[tseaver]

@shanwei8 Can you please link the issue you created describing the problem?

[parthea]

Superseded by #62