Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/79a4aef: Update to 5.123.0, ghost-cli 1.27.0

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: 5.121.0, 5.121, 5, latest
+Tags: 5.123.0, 5.123, 5, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 0c9978cf2491877e60e250866c2575e694bdde04
+GitCommit: 79a4aefbcef7297936c2a3a51f6c6607eed1b1a5
 Directory: 5/debian
 
-Tags: 5.121.0-alpine, 5.121-alpine, 5-alpine, alpine
+Tags: 5.123.0-alpine, 5.123-alpine, 5-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 84b2e6edbf30790d7b99d06580ac48f71d1bf47d
+GitCommit: 79a4aefbcef7297936c2a3a51f6c6607eed1b1a5
 Directory: 5/alpine