Bump @asciidoctor/tabs from 1.0.0-beta.3 to 1.0.0-beta.6

Bumps [@asciidoctor/tabs](https://github.com/asciidoctor/asciidoctor-tabs) from 1.0.0-beta.3 to 1.0.0-beta.6.
- [Changelog](https://github.com/asciidoctor/asciidoctor-tabs/blob/main/CHANGELOG.adoc)
- [Commits](https://github.com/asciidoctor/asciidoctor-tabs/compare/v1.0.0-beta.3...v1.0.0-beta.6)

---
updated-dependencies:
- dependency-name: "@asciidoctor/tabs"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -3,7 +3,7 @@
     "antora": "latest",
     "@antora/atlas-extension": "1.0.0-alpha.1",
     "@antora/collector-extension": "1.0.0-alpha.3",
-    "@asciidoctor/tabs": "1.0.0-beta.3",
+    "@asciidoctor/tabs": "1.0.0-beta.6",
     "@springio/antora-extensions": "1.7.0",
     "@springio/asciidoctor-extensions": "1.0.0-alpha.10"
   }