Update plugin download to v5.6.0 (#7001)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -50,7 +50,7 @@ poko-annotations = { module = "dev.drewhamilton.poko:poko-annotations", version.
 kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 binaryCompatibilityValidator = { id = "org.jetbrains.kotlinx.binary-compatibility-validator", version = "0.14.0" }
 dokka = { id = "org.jetbrains.dokka", version.ref = "dokka" }
-download = { id = "de.undercouch.download", version = "5.5.0" }
+download = { id = "de.undercouch.download", version = "5.6.0" }
 pluginPublishing = { id = "com.gradle.plugin-publish", version = "1.2.1" }
 poko = { id = "dev.drewhamilton.poko", version.ref = "poko" }
 nexusPublish = { id = "io.github.gradle-nexus.publish-plugin", version = "1.3.0" }