Update actions/setup-go action to v5

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-go	action	major	v3 -> v5

• [ ] PR contains the label that identifies the area, one of: area:operator, area:chart
• [ ] If the PR is targeting a Helm chart, add the chart label, e.g. chart:k8up

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Release Notes

actions/setup-go (actions/setup-go)

### [`v5`](https://togithub.com/actions/setup-go/compare/v4...v5) [Compare Source](https://togithub.com/actions/setup-go/compare/v4...v5) ### [`v4`](https://togithub.com/actions/setup-go/compare/v3...v4) [Compare Source](https://togithub.com/actions/setup-go/compare/v3...v4)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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