build(deps): bump reitzig/actions-asciidoctor from 2.0.2 to 2.0.3

Bumps [reitzig/actions-asciidoctor](https://github.com/reitzig/actions-asciidoctor) from 2.0.2 to 2.0.3.
- [Release notes](https://github.com/reitzig/actions-asciidoctor/releases)
- [Changelog](https://github.com/reitzig/actions-asciidoctor/blob/master/CHANGELOG.md)
- [Commits](reitzig/actions-asciidoctor@v2.0.2...v2.0.3)

---
updated-dependencies:
- dependency-name: reitzig/actions-asciidoctor
  dependency-version: 2.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -75,7 +75,7 @@ jobs:
         with:
           ruby-version: 2.7
 
-      - uses: reitzig/actions-asciidoctor@v2.0.2
+      - uses: reitzig/actions-asciidoctor@v2.0.3
         with:
           version: 2.0.18
       - name: Prepare release