chore(deps): update go to v1.21.2 (patch)

[cilium-renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker.io/library/golang		patch	1.21.1-alpine -> 1.21.2-alpine
docker.io/library/golang	final	patch	1.21.1 -> 1.21.2
docker.io/library/golang	stage	patch	1.21.1 -> 1.21.2
go (source)		patch	1.21.1 -> 1.21.2

---

Configuration

📅 Schedule: Branch creation - "on monday" (UTC), 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 these updates again.

---

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

---

This PR has been generated by Renovate Bot.