Bump spring-io/spring-doc-actions in the development-dependencies group

Bumps the development-dependencies group with 1 update: [spring-io/spring-doc-actions](https://github.com/spring-io/spring-doc-actions).


Updates `spring-io/spring-doc-actions` from 0.0.19 to 0.0.20
- [Commits](https://github.com/spring-io/spring-doc-actions/compare/v0.0.19...v0.0.20)

---
updated-dependencies:
- dependency-name: spring-io/spring-doc-actions
  dependency-version: 0.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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

.github/workflows/ci.yml

@@ -128,7 +128,7 @@ jobs:
         run: |
           ./gradlew antora
       - name: Publish Docs
-        uses: spring-io/spring-doc-actions/rsync-antora-reference@v0.0.19
+        uses: spring-io/spring-doc-actions/rsync-antora-reference@v0.0.20
         with:
           docs-username: ${{ secrets.DOCS_USERNAME }}
           docs-host: ${{ secrets.DOCS_HOST }}
@@ -136,7 +136,7 @@ jobs:
           docs-ssh-host-key: ${{ secrets.DOCS_SSH_HOST_KEY }}
           site-path: spring-pulsar-docs/build/site
       - name: Bust Clouflare Cache
-        uses: spring-io/spring-doc-actions/bust-cloudflare-antora-cache@v0.0.19
+        uses: spring-io/spring-doc-actions/bust-cloudflare-antora-cache@v0.0.20
         with:
           context-root: spring-pulsar
           cloudflare-zone-id: ${{ secrets.CLOUDFLARE_ZONE_ID }}