build(deps): Bump @tryghost/content-api from 1.11.28 to 1.12.9

Bumps [@tryghost/content-api](https://github.com/TryGhost/SDK/tree/HEAD/packages/content-api) from 1.11.28 to 1.12.9.
- [Commits](https://github.com/TryGhost/SDK/commits/@tryghost/content-api@1.12.9/packages/content-api)

---
updated-dependencies:
- dependency-name: "@tryghost/content-api"
  dependency-version: 1.12.9
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

apps/portal/package.json

@@ -12,7 +12,7 @@
     "@radix-ui/react-tooltip": "1.2.7",
     "@scalar/api-reference-react": "^0.7.42",
     "@tanstack/react-query": "5.81.5",
-    "@tryghost/content-api": "^1.11.28",
+    "@tryghost/content-api": "^1.12.9",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "date-fns": "4.1.0",