Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/eb667a8: Update to 5.73.1, ghost-cli 1.25.3
- https://github.com/docker-library/ghost/commit/749d36d: Update to 5.72.2, ghost-cli 1.25.3

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: 5.72.1, 5.72, 5, latest
+Tags: 5.73.1, 5.73, 5, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 45d9e46166cd5a56cbd91776ebe773ff1bb23d47
+GitCommit: eb667a8933b0cd1ebec20a4494c020432d418b5a
 Directory: 5/debian
 
-Tags: 5.72.1-alpine, 5.72-alpine, 5-alpine, alpine
+Tags: 5.73.1-alpine, 5.73-alpine, 5-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 45d9e46166cd5a56cbd91776ebe773ff1bb23d47
+GitCommit: eb667a8933b0cd1ebec20a4494c020432d418b5a
 Directory: 5/alpine