Use Gradle resolutionStrategy to align asciidoctor plugin versions

All plugins (convert, pdf, etc) are released together and compatibility
between versions is not guaranteed.
So, this PR uses 'resolutionStrategy' to assign the same version to all
plugins ensuring they are all aligned

settings.gradle

@@ -15,11 +15,18 @@
  */
 
 pluginManagement {
+	resolutionStrategy {
+		eachPlugin {
+			if (requested.id.namespace?.startsWith('org.asciidoctor.jvm')) {
+				useVersion("4.0.1")
+			}
+		}
+	}
 	plugins {
 		id "org.springframework.boot" version "2.6.15"
 		id "io.spring.nohttp" version "0.0.11"
-		id 'org.asciidoctor.jvm.pdf' version '3.3.2'
-		id 'org.asciidoctor.jvm.convert' version '4.0.1'
+		id 'org.asciidoctor.jvm.convert'
+		id 'org.asciidoctor.jvm.pdf'
 	}
 	repositories {
 		gradlePluginPortal()