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:cc3ef538c8395e2cf5ca6c2c7df698b8d2028c76950bf0a33d4b48a63ffbbe70
+FROM docker.io/library/haproxy:2.8-alpine@sha256:85fbb910ca0050c0310e430b2fb74c816285f145c4ed20126a973b94ee67e24d
 
 EXPOSE 2375
 ENV ALLOW_RESTARTS=0 \