docs: Point user at real regions.

[toothbrush]

https://entire.io/gh/entireio/cli/trails/628

I noticed a few nonexistent regions had snuck into our user-facing help texts. Fix.

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Note

Low Risk
Documentation-only example string changes with no effect on command logic or defaults.

Overview
Updates cobra Example strings for entire repo mirror create and entire repo mirror collaborators add so the optional cluster-host shows us-east-2.entire.io instead of the fictional eu-west-1.entire.io.

No runtime behavior, defaults (defaultClusterHost), or validation change—only copy users see in --help and generated docs.

^{Reviewed by Cursor Bugbot for commit 574bb88. Configure here.}

[Copilot]

Pull request overview

This PR updates user-facing Cobra Example strings for the entire repo mirror commands to avoid referencing nonexistent/fictional cluster regions in --help output.

Changes:

• Update entire repo mirror create help example to use a different cluster-host.
• Update entire repo mirror collaborators add help example to use a different cluster-host.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
cmd/entire/cli/repo_mirror.go	Updates the Example string shown in entire repo mirror create --help.
cmd/entire/cli/repo_mirror_collaborators.go	Updates the Example string shown in entire repo mirror collaborators add --help.