Bump @springio/asciidoctor-extensions in /docs
Bumps [@springio/asciidoctor-extensions](https://github.com/spring-io/asciidoctor-extensions) from 1.0.0-alpha.14 to 1.0.0-alpha.16.
- [Changelog](https://github.com/spring-io/asciidoctor-extensions/blob/main/CHANGELOG.adoc)
- [Commits](https://github.com/spring-io/asciidoctor-extensions/compare/v1.0.0-alpha.14...v1.0.0-alpha.16)
---
updated-dependencies:
- dependency-name: "@springio/asciidoctor-extensions"
dependency-type: direct:production
update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>
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