feat(Dependencies): Update haproxy Docker tag to v3.1.12

| datasource | package | from  | to     |
| ---------- | ------- | ----- | ------ |
| docker     | haproxy | 3.1.0 | 3.1.12 |

Author: renovate[bot]

docker-compose.site.yml

@@ -51,7 +51,7 @@ services:
     # use the one below to have haproxy debug log directly to stdout including
     # every request with auth headers
     # image: mminks/haproxy-docker-logging:latest
-    image: "haproxy:3.1.0-alpine"
+    image: "haproxy:3.1.12-alpine"
     # use self build Dockerfile as alternative
     # build: prod/haproxy
     container_name: project_usage_proxy