Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/86f71b0: Update to 4.3.0, ghost-cli 1.16.3

library/ghost

@@ -4,14 +4,14 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/ghost.git
 
-Tags: 4.2.2, 4.2, 4, latest
+Tags: 4.3.0, 4.3, 4, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 1d890151853618d754ec11b39e7d4f787ed5a05f
+GitCommit: 86f71b01ebcbd3e8515e1b0aa2a5396790fd0a0c
 Directory: 4/debian
 
-Tags: 4.2.2-alpine, 4.2-alpine, 4-alpine, alpine
+Tags: 4.3.0-alpine, 4.3-alpine, 4-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 1d890151853618d754ec11b39e7d4f787ed5a05f
+GitCommit: 86f71b01ebcbd3e8515e1b0aa2a5396790fd0a0c
 Directory: 4/alpine
 
 Tags: 3.42.5, 3.42, 3