refactor: improve SBOM artifact handling

Author: NelsonMeleth

buildSrc/src/main/kotlin/docling-release.gradle.kts

@@ -15,10 +15,9 @@ publishing {
       from(components["java"])
 
       // Attach SBOM artifact to publication
-      artifact(layout.buildDirectory.file("reports/cyclonedx/bom.json")) {
+      artifact(tasks.named("cyclonedxBom")) {
         classifier = "cyclonedx"
         extension = "json"
-        builtBy(tasks.named("cyclonedxBom"))
       }
 
       pom {

buildSrc/src/main/kotlin/docling-sbom.gradle.kts

@@ -2,7 +2,8 @@ plugins {
   id("org.cyclonedx.bom")
 }
 
-tasks.named("cyclonedxBom") {
+tasks.named<org.cyclonedx.gradle.CyclonedxAggregateTask>("cyclonedxBom") {
   group = "build"
   description = "Generates a CycloneDX Software Bill of Materials (SBOM)"
+  xmlOutput.unsetConvention() // Generate only JSON format
 }