Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/1280dd9: Merge pull request https://github.com/docker-library/ghost/pull/240 from infosiftr/exclude-s390x-ppc64le-alpine
- https://github.com/docker-library/ghost/commit/57d075a: Exclude "ppc64le" and "s390x" on Alpine variant

library/ghost

@@ -1,4 +1,4 @@
-# this file is generated via https://github.com/docker-library/ghost/blob/0779a673aaa5c23e104247292105f13448a49517/generate-stackbrew-library.sh
+# this file is generated via https://github.com/docker-library/ghost/blob/57d075a479f950ded0b96578139e07b4829d754f/generate-stackbrew-library.sh
 
 Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
@@ -10,7 +10,7 @@ GitCommit: 705e1d8724e478a93fbb76b6cfdf670d86f01d9e
 Directory: 3/debian
 
 Tags: 3.37.1-alpine, 3.37-alpine, 3-alpine, alpine
-Architectures: amd64, arm32v6, arm32v7, arm64v8, ppc64le, s390x
+Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 705e1d8724e478a93fbb76b6cfdf670d86f01d9e
 Directory: 3/alpine
 
@@ -20,6 +20,6 @@ GitCommit: 705e1d8724e478a93fbb76b6cfdf670d86f01d9e
 Directory: 2/debian
 
 Tags: 2.38.2-alpine, 2.38-alpine, 2-alpine
-Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386
 GitCommit: 705e1d8724e478a93fbb76b6cfdf670d86f01d9e
 Directory: 2/alpine