Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/8ffe59d: Update to 3.1.1, ghost-cli 1.13.1

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: 3.1.0, 3.1, 3, latest
+Tags: 3.1.1, 3.1, 3, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 2ad8482c901c5962f374deb475fafa1716a4b2fa
+GitCommit: 8ffe59daa52588c6e327e72a6e9413e4659bc373
 Directory: 3/debian
 
-Tags: 3.1.0-alpine, 3.1-alpine, 3-alpine, alpine
+Tags: 3.1.1-alpine, 3.1-alpine, 3-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 2ad8482c901c5962f374deb475fafa1716a4b2fa
+GitCommit: 8ffe59daa52588c6e327e72a6e9413e4659bc373
 Directory: 3/alpine
 
 Tags: 2.37.0, 2.37, 2