Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/d50d6bc: Update to 4.38.0, ghost-cli 1.18.1

library/ghost

@@ -4,12 +4,12 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/ghost.git
 
-Tags: 4.37.0, 4.37, 4, latest
+Tags: 4.38.0, 4.38, 4, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 808c6c35fc82c6e1fc97c645bd580aa62ca5b959
+GitCommit: d50d6bc7cb14949c9fc8d4384f06fd80ad6d3f75
 Directory: 4/debian
 
-Tags: 4.37.0-alpine, 4.37-alpine, 4-alpine, alpine
+Tags: 4.38.0-alpine, 4.38-alpine, 4-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 808c6c35fc82c6e1fc97c645bd580aa62ca5b959
+GitCommit: d50d6bc7cb14949c9fc8d4384f06fd80ad6d3f75
 Directory: 4/alpine