Bump @antora/cli from 3.2.0-alpha.4 to 3.2.0-alpha.9 in /antora

Bumps [@antora/cli](https://gitlab.com/antora/antora) from 3.2.0-alpha.4 to 3.2.0-alpha.9.
- [Changelog](https://gitlab.com/antora/antora/blob/main/CHANGELOG.adoc)
- [Commits](https://gitlab.com/antora/antora/compare/v3.2.0-alpha.4...v3.2.0-alpha.9)

---
updated-dependencies:
- dependency-name: "@antora/cli"
  dependency-version: 3.2.0-alpha.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

antora/package-lock.json

@@ -4,7 +4,7 @@
     "postinstall": "patch-package"
   },
   "dependencies": {
-    "@antora/cli": "3.2.0-alpha.4",
+    "@antora/cli": "3.2.0-alpha.9",
     "@antora/site-generator": "3.2.0-alpha.4",
     "@antora/atlas-extension": "1.0.0-alpha.2",
     "@springio/antora-extensions": "1.14.7",