Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/6f8c7d7: Update to 5.31.0, ghost-cli 1.24.0

library/ghost

@@ -5,14 +5,14 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Austin Burdine <[email protected]> (@acburdine)
 GitRepo: https://github.com/docker-library/ghost.git
 
-Tags: 5.30.1, 5.30, 5, latest
+Tags: 5.31.0, 5.31, 5, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: a9fb573779ed7fc5ad7a2480f1eccaa80fa68518
+GitCommit: 6f8c7d789bf0634cacf9b60b907c854acce23b17
 Directory: 5/debian
 
-Tags: 5.30.1-alpine, 5.30-alpine, 5-alpine, alpine
+Tags: 5.31.0-alpine, 5.31-alpine, 5-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: a9fb573779ed7fc5ad7a2480f1eccaa80fa68518
+GitCommit: 6f8c7d789bf0634cacf9b60b907c854acce23b17
 Directory: 5/alpine
 
 Tags: 4.48.9, 4.48, 4