Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/551c52b: Update to 5.88.3, ghost-cli 1.26.0

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: 5.88.2, 5.88, 5, latest
+Tags: 5.88.3, 5.88, 5, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 22f52c7dce218c90e39ca9d24490564929f4043a
+GitCommit: 551c52bee52afc9b1da4b2bc54c0120d5151ab3f
 Directory: 5/debian
 
-Tags: 5.88.2-alpine, 5.88-alpine, 5-alpine, alpine
+Tags: 5.88.3-alpine, 5.88-alpine, 5-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 22f52c7dce218c90e39ca9d24490564929f4043a
+GitCommit: 551c52bee52afc9b1da4b2bc54c0120d5151ab3f
 Directory: 5/alpine