Update haproxy

Changes:

- https://github.com/docker-library/haproxy/commit/6315103: Update to 2.4-dev6

library/haproxy

@@ -4,14 +4,14 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/haproxy.git
 
-Tags: 2.4-dev5, 2.4-dev
+Tags: 2.4-dev6, 2.4-dev
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 2b1ab821252292159f7caa2fb03ce90a120074ab
+GitCommit: 63151039103973f61addbfd90c7eeb027d916682
 Directory: 2.4-rc
 
-Tags: 2.4-dev5-alpine, 2.4-dev-alpine
+Tags: 2.4-dev6-alpine, 2.4-dev-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 2b1ab821252292159f7caa2fb03ce90a120074ab
+GitCommit: 63151039103973f61addbfd90c7eeb027d916682
 Directory: 2.4-rc/alpine
 
 Tags: 2.3.4, 2.3, latest