Update haproxy

Changes:

- https://github.com/docker-library/haproxy/commit/787536c: Update 2.4-rc to 2.4-dev16

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-dev15, 2.4-dev
+Tags: 2.4-dev16, 2.4-dev
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 9c38475f2eba2062b0913a728029ba1ed4f6dae8
+GitCommit: 787536c6d9ad19a63be432a411ae479133f083f7
 Directory: 2.4-rc
 
-Tags: 2.4-dev15-alpine, 2.4-dev-alpine
+Tags: 2.4-dev16-alpine, 2.4-dev-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 9c38475f2eba2062b0913a728029ba1ed4f6dae8
+GitCommit: 787536c6d9ad19a63be432a411ae479133f083f7
 Directory: 2.4-rc/alpine
 
 Tags: 2.3.9, 2.3, latest