Update httpd

Changes:

- https://github.com/docker-library/httpd/commit/4d89a55: Update to 2.4.51

library/httpd

@@ -4,12 +4,12 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/httpd.git
 
-Tags: 2.4.50, 2.4, 2, latest, 2.4.50-buster, 2.4-buster, 2-buster, buster
+Tags: 2.4.51, 2.4, 2, latest, 2.4.51-buster, 2.4-buster, 2-buster, buster
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 1f123b76be535ae2d577b93d3bf9a298ee897a8c
+GitCommit: 4d89a55e9e5742bebd10fddf83ffb07f2df4d7a0
 Directory: 2.4
 
-Tags: 2.4.50-alpine, 2.4-alpine, 2-alpine, alpine, 2.4.50-alpine3.14, 2.4-alpine3.14, 2-alpine3.14, alpine3.14
+Tags: 2.4.51-alpine, 2.4-alpine, 2-alpine, alpine, 2.4.51-alpine3.14, 2.4-alpine3.14, 2-alpine3.14, alpine3.14
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 1f123b76be535ae2d577b93d3bf9a298ee897a8c
+GitCommit: 4d89a55e9e5742bebd10fddf83ffb07f2df4d7a0
 Directory: 2.4/alpine