Update ghost

Changes:

- docker-library/ghost@e102cca: Update to 4.48.2, ghost-cli 1.21.1
- docker-library/ghost@0bb440b: Update to 5.7.0, ghost-cli 1.21.1
- docker-library/ghost@b8bf204: Update to 5.6.0, ghost-cli 1.21.0

Author: docker-library-bot

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: 5.5.0, 5.5, 5, latest
+Tags: 5.7.0, 5.7, 5, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: f1009d6e937cc1050a598b3a63f9384347f370f3
+GitCommit: 0bb440b502415c9fefbae826c5c14fd3d3fde689
 Directory: 5/debian
 
-Tags: 5.5.0-alpine, 5.5-alpine, 5-alpine, alpine
+Tags: 5.7.0-alpine, 5.7-alpine, 5-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: f1009d6e937cc1050a598b3a63f9384347f370f3
+GitCommit: 0bb440b502415c9fefbae826c5c14fd3d3fde689
 Directory: 5/alpine
 
 Tags: 4.48.2, 4.48, 4
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 272971cf01000f76fd8594e9be7f9785c2ddd821
+GitCommit: e102cca6857b6d59512c183cf1cdba44e53a060d
 Directory: 4/debian
 
 Tags: 4.48.2-alpine, 4.48-alpine, 4-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 3c0190da0bc240150dd335c084dcb4c995cec7b7
+GitCommit: e102cca6857b6d59512c183cf1cdba44e53a060d
 Directory: 4/alpine