gradle: fix bad group

Author: Bixilon

build.gradle.kts

@@ -680,7 +680,6 @@ tasks.register("upload") {
 tasks.register<Exec>("nsight") {
     dependsOn("processResources", "compileKotlin", "compileJava")
     // thanks: https://hub.jmonkeyengine.org/t/gradle-nvidia-nsight-graphics/48130
-    group = "application"
     val run = tasks.named<JavaExec>("run").get()
     val home = run.javaLauncher.get().metadata.installationPath.asFile.absolutePath