Bump org.asciidoctor.jvm.convert from 3.3.0 to 4.0.3

Bumps org.asciidoctor.jvm.convert from 3.3.0 to 4.0.3.

---
updated-dependencies:
- dependency-name: org.asciidoctor.jvm.convert
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id 'io.spring.dependency-management' version '1.0.11.RELEASE'
     id 'org.springframework.boot' version '2.6.6'
-    id "org.asciidoctor.jvm.convert" version "3.3.0"
+    id "org.asciidoctor.jvm.convert" version "4.0.3"
     id "org.owasp.dependencycheck" version "7.3.0"
     id 'net.researchgate.release' version '3.0.2'
     id "com.gorylenko.gradle-git-properties" version "2.4.1"