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

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Dockerfile

-FROM docker.io/library/haproxy:2.7-alpine@sha256:19ce7d4c6acc9fc68e41c5fdeeee7b63e57ebf496434de640768fbcff7c727f2
+FROM docker.io/library/haproxy:2.8-alpine@sha256:d62c4735b7d4bfa11e012480446f442e545bd8c9a3431398a90cfb5bc6ec61ac
 
 EXPOSE 2375
 ENV ALLOW_RESTARTS=0 \