Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/9577b1d: Update to 5.54.0, ghost-cli 1.24.2
- https://github.com/docker-library/ghost/commit/c590715: Update to 5.53.4, ghost-cli 1.24.2

library/ghost

@@ -5,12 +5,12 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Austin Burdine <[email protected]> (@acburdine)
 GitRepo: https://github.com/docker-library/ghost.git
 
-Tags: 5.53.4, 5.53, 5, latest
+Tags: 5.54.0, 5.54, 5, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 5db5d3d87657343507bb413ecd642b446f3f8790
+GitCommit: 9577b1d3b4560adc3cc8c0dd21a14067fd77e120
 Directory: 5/debian
 
-Tags: 5.53.4-alpine, 5.53-alpine, 5-alpine, alpine
+Tags: 5.54.0-alpine, 5.54-alpine, 5-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 5db5d3d87657343507bb413ecd642b446f3f8790
+GitCommit: 9577b1d3b4560adc3cc8c0dd21a14067fd77e120
 Directory: 5/alpine