Bump io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch

Bumps [io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch](https://github.com/spring-io/spring-asciidoctor-extensions) from 0.6.2 to 0.6.3.
- [Release notes](https://github.com/spring-io/spring-asciidoctor-extensions/releases)
- [Commits](spring-io/spring-asciidoctor-extensions@v0.6.2...v0.6.3)

---
updated-dependencies:
- dependency-name: io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

documentation/build.gradle

@@ -29,7 +29,7 @@ dependencies {
     javadocClasspath "org.apache.maven.plugins:maven-plugin-plugin:3.10.2"
     javadocClasspath 'net.sourceforge.plantuml:plantuml:1.2023.12'
 
-    asciidoctorExt "io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.6.2"
+    asciidoctorExt "io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.6.3"
 }
 
 tasks.register("docsZip", Zip) {