build(deps): bump rancher-cli to v2.12.1

[github-actions]

bump rancher-cli to v2.12.1

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GitHub Releases Update

Update version

change detected: * key "$.runs.steps[0].env.DEFAULT_RANCHER_CLI_VERSION" updated from "2.12.0" to "2.12.1", in file ".github/actions/setup-rancher-cli/action.yml"

v2.12.1

<!-- v2.12 -->

## Changes since v2.12.0:

* Bump Go to 1.24.6 [(#457)](https://github.com/rancher/cli/pull/457)
* Bump `rancher/rancher` to `v2.12.1-alpha1` [(#464)](https://github.com/rancher/cli/pull/464)
* Update rancher to v2.12.1 [(#468)](https://github.com/rancher/cli/pull/468)

GitHub Action workflow link

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