Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/6f53687: Update to 4.34.0, ghost-cli 1.18.1
- https://github.com/docker-library/ghost/commit/6ecf8eb: Update to 4.33.2, ghost-cli 1.18.1

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: 4.33.1, 4.33, 4, latest
+Tags: 4.34.0, 4.34, 4, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 06b5629ed1c9a0ecf184a391dbcdcb722ae3e1d9
+GitCommit: 6f53687517e7f389fa5538e5696d8964e20649be
 Directory: 4/debian
 
-Tags: 4.33.1-alpine, 4.33-alpine, 4-alpine, alpine
+Tags: 4.34.0-alpine, 4.34-alpine, 4-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 06b5629ed1c9a0ecf184a391dbcdcb722ae3e1d9
+GitCommit: 6f53687517e7f389fa5538e5696d8964e20649be
 Directory: 4/alpine
 
 Tags: 3.42.9, 3.42, 3