update vaadin and lombok versionsand disable asciidoctor

kontor-spring/build.gradle

@@ -8,8 +8,8 @@ buildscript {
         }
     }
     repositories {
+        mavenCentral()
         maven { setUrl("https://nexus.thpeetz.de/repository/maven-central") }
-        //mavenCentral()
         maven { setUrl("https://maven.vaadin.com/vaadin-prereleases") }
         maven { setUrl("https://repo.spring.io/milestone") }
     }
@@ -28,23 +28,23 @@ plugins {
     alias(libs.plugins.spring.dependencies)
     alias(libs.plugins.vaadin)
     alias(libs.plugins.lombok)
-    alias(libs.plugins.asciidoctorPdf)
-    alias(libs.plugins.asciidoctorConvert)
-    alias(libs.plugins.asciidoctorGems)
-    id "de.infolektuell.typst" version "0.8.0"
+    //alias(libs.plugins.asciidoctorPdf)
+    //alias(libs.plugins.asciidoctorConvert)
+    //alias(libs.plugins.asciidoctorGems)
+    //id "de.infolektuell.typst" version "0.8.0"
 }
 
 repositories {
     maven { setUrl("https://nexus.thpeetz.de/repository/maven-central") }
-    //mavenCentral()
-    ruby.gems()
+    mavenCentral()
+    //ruby.gems()
     maven { setUrl("https://maven.vaadin.com/vaadin-prereleases") }
     maven { setUrl("https://repo.spring.io/milestone") }
     maven { setUrl("https://maven.vaadin.com/vaadin-addons") }
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_21
 }
 
 configurations {
@@ -90,7 +90,7 @@ dependencies {
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
     compileOnly 'org.projectlombok:lombok'
     annotationProcessor 'org.projectlombok:lombok'
-    asciidoctorGems libs.rouge
+    //asciidoctorGems libs.rouge
     //asciidoctorGems libs.diagram
 }
 
@@ -226,5 +226,5 @@ reporting {
 }
 
 wrapper {
-    gradleVersion = "8.6"
+    gradleVersion = libs.versions.gradle.get().toString()
 }