Update ghost

Changes:

- https://github.com/docker-library/ghost/commit/84b2e6e: Merge pull request https://github.com/docker-library/ghost/pull/439 from infosiftr/alpine3.22
- https://github.com/docker-library/ghost/commit/6960d04: Update to Alpine 3.22

library/ghost

@@ -12,5 +12,5 @@ Directory: 5/debian
 
 Tags: 5.121.0-alpine, 5.121-alpine, 5-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 0c9978cf2491877e60e250866c2575e694bdde04
+GitCommit: 84b2e6edbf30790d7b99d06580ac48f71d1bf47d
 Directory: 5/alpine