Bump antora from 3.1.5 to 3.1.6 (#131)

Bumps [antora](https://gitlab.com/antora/antora) from 3.1.5 to 3.1.6.
- [Changelog](https://gitlab.com/antora/antora/blob/main/CHANGELOG.adoc)
- [Commits](https://gitlab.com/antora/antora/compare/v3.1.5...v3.1.6)

---
updated-dependencies:
- dependency-name: antora
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -7,7 +7,7 @@
     "build": "antora antora-playbook.yml"
   },
   "dependencies": {
-    "antora": "~3.1.5",
+    "antora": "~3.1.6",
     "asciidoctor-kroki": "~0.18.1"
   },
   "repository": {