Update ghost (#20110)

Changes:

- https://github.com/docker-library/ghost/commit/e092f98: Update to 6.4.0, ghost-cli 1.28.3

Co-authored-by: Docker Library Bot <[email protected]>

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: 6.3.1, 6.3, 6, latest
+Tags: 6.4.0, 6.4, 6, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: d9131c1c24594d782e0ddac3a98daae9237a1202
+GitCommit: e092f980a4b38a19303f42b7eceb7b80d441e202
 Directory: 6/debian
 
-Tags: 6.3.1-alpine, 6.3-alpine, 6-alpine, alpine
+Tags: 6.4.0-alpine, 6.4-alpine, 6-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: d9131c1c24594d782e0ddac3a98daae9237a1202
+GitCommit: e092f980a4b38a19303f42b7eceb7b80d441e202
 Directory: 6/alpine
 
 Tags: 5.130.5, 5.130, 5