Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/989a3bb: Update to 4.5.0, ghost-cli 1.17.1
- https://github.com/docker-library/ghost/commit/734ab78: Update to 3.42.5, ghost-cli 1.17.1
- https://github.com/docker-library/ghost/commit/97d02cf: Update to 4.4.0, ghost-cli 1.17.1

library/ghost

@@ -4,22 +4,22 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/ghost.git
 
-Tags: 4.4.0, 4.4, 4, latest
+Tags: 4.5.0, 4.5, 4, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 1d8798b50dd0b59d10cf2d2bef781fc8b09fd371
+GitCommit: 989a3bbe3a7fc80357e44d6374fa2afbb2c7456b
 Directory: 4/debian
 
-Tags: 4.4.0-alpine, 4.4-alpine, 4-alpine, alpine
+Tags: 4.5.0-alpine, 4.5-alpine, 4-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 1d8798b50dd0b59d10cf2d2bef781fc8b09fd371
+GitCommit: 989a3bbe3a7fc80357e44d6374fa2afbb2c7456b
 Directory: 4/alpine
 
 Tags: 3.42.5, 3.42, 3
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: d873369b5ce2346e366a877340bec534338772e0
+GitCommit: 734ab782a545fa97a5f577e8ca7049169fac5701
 Directory: 3/debian
 
 Tags: 3.42.5-alpine, 3.42-alpine, 3-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: d873369b5ce2346e366a877340bec534338772e0
+GitCommit: 734ab782a545fa97a5f577e8ca7049169fac5701
 Directory: 3/alpine