build(deps): bump haproxy in /Containers/docker-socket-proxy

Bumps haproxy from 3.1.1-alpine to 3.1.2-alpine.

---
updated-dependencies:
- dependency-name: haproxy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Containers/docker-socket-proxy/Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:latest
-FROM haproxy:3.1.1-alpine
+FROM haproxy:3.1.2-alpine
 
 # hadolint ignore=DL3002
 USER root