Update haproxy to the lastest version included in the buster backports

Builds will fail with the old version as the package is not available
on all mirrors anymore.

container/Dockerfile.haproxy

@@ -17,7 +17,7 @@ FROM debian:${debian_tag}
 
 COPY buster-backports.list /etc/apt/sources.list.d/
 
-ARG haproxy_version=2.0.13-1~bpo10+1
+ARG haproxy_version=2.0.14-1~bpo10+1
 ARG dataplane_version=v1.2.4
 
 RUN apt-get update -q && apt-get install -y -q curl && \