chore(deps): update docker.io/library/haproxy docker tag to v2.8

This MR contains the following updates:

Package	Type	Update	Change
docker.io/library/haproxy	final	minor	2.7-alpine -> 2.8-alpine

---

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 MR becomes conflicted, or you tick the rebase/retry checkbox.

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

---

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

---

This MR has been generated by Renovate Bot. The local configuration can be found in the SI Renovate Bot repository.

Dockerfile

-FROM docker.io/library/haproxy:2.7-alpine@sha256:1d0ed4c996e8172d5e6cd4bae87ce24da472bd7438f7adfa25f42674bce4675a
+FROM docker.io/library/haproxy:2.8-alpine@sha256:bdc35cf81769d0043602434480846f9797d8ff0468226f23dd640eceef6c09cd
 
 EXPOSE 2375
 ENV ALLOW_RESTARTS=0 \