Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/4e73479: Update to 4.22.3, ghost-cli 1.18.0
- https://github.com/docker-library/ghost/commit/f4395c5: Update to 4.22.2, ghost-cli 1.18.0

library/ghost

@@ -4,14 +4,14 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/ghost.git
 
-Tags: 4.22.1, 4.22, 4, latest
+Tags: 4.22.3, 4.22, 4, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: e5979d15b38e5591adf662a8b55d5df4ec9d6f12
+GitCommit: 4e73479312a2462fd9b0c6dffcca94195805a8a8
 Directory: 4/debian
 
-Tags: 4.22.1-alpine, 4.22-alpine, 4-alpine, alpine
+Tags: 4.22.3-alpine, 4.22-alpine, 4-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: e5979d15b38e5591adf662a8b55d5df4ec9d6f12
+GitCommit: 4e73479312a2462fd9b0c6dffcca94195805a8a8
 Directory: 4/alpine
 
 Tags: 3.42.7, 3.42, 3