Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/3830ef8: Update to 4.47.4, ghost-cli 1.19.3
- https://github.com/docker-library/ghost/commit/f40fa41: Update to 4.47.3, ghost-cli 1.19.3
- https://github.com/docker-library/ghost/commit/e7b94ae: Update to 4.47.2, ghost-cli 1.19.3

library/ghost

@@ -4,12 +4,12 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/ghost.git
 
-Tags: 4.47.1, 4.47, 4, latest
+Tags: 4.47.4, 4.47, 4, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 91bb26466eba6ff3409bb3eb4a2997cdcf0bd420
+GitCommit: 3830ef877edb21be9f3fc237141d04a128e989b4
 Directory: 4/debian
 
-Tags: 4.47.1-alpine, 4.47-alpine, 4-alpine, alpine
+Tags: 4.47.4-alpine, 4.47-alpine, 4-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 91bb26466eba6ff3409bb3eb4a2997cdcf0bd420
+GitCommit: 3830ef877edb21be9f3fc237141d04a128e989b4
 Directory: 4/alpine