Merge pull request #49622 from dependabot[bot]

* dependabot/npm_and_yarn/antora/springio/asciidoctor-extensions-1.0.0-alpha.18:
  Bump @springio/asciidoctor-extensions in /antora

Closes gh-49622

Author: snicoll

antora/package-lock.json

@@ -10,7 +10,7 @@
     "@springio/antora-xref-extension": "1.0.0-alpha.5",
     "@springio/antora-zip-contents-collector-extension": "1.0.0-alpha.10",
     "@asciidoctor/tabs": "1.0.0-beta.6",
-    "@springio/asciidoctor-extensions": "1.0.0-alpha.17"
+    "@springio/asciidoctor-extensions": "1.0.0-alpha.18"
   },
   "config": {
     "ui-bundle-url": "https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.25/ui-bundle.zip"