Update httpd

Changes:

- docker-library/httpd@6f891de: Merge pull request docker-library/httpd#161 from J0WI/alpine-3.12
- docker-library/httpd@b52f30b: Upgrade Alpine to 3.12
- docker-library/httpd@1f4f797: Merge pull request docker-library/httpd#159 from docker-library/github-actions
- docker-library/httpd@13a3f77: Add initial GitHub Actions CI

Author: docker-library-bot

library/httpd

@@ -11,5 +11,5 @@ Directory: 2.4
 
 Tags: 2.4.43-alpine, 2.4-alpine, 2-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 6c8e82e20ecefc94c616439f15d14c4bb215b200
+GitCommit: b52f30b211a0e127d498ce7ecbcbb31e6336cff2
 Directory: 2.4/alpine