Update dependency com.github.node-gradle:gradle-node-plugin to v6

Author: renovate[bot]

gradle/libs.versions.toml

@@ -21,7 +21,7 @@ kotlinProcess = "1.4.1"                  # https://github.com/pgreze/kotlin-proc
 
 classgraph = "4.8.161"                   # https://github.com/classgraph/classgraph/releases
 
-gradleNodePlugin = "4.0.0"               # https://github.com/node-gradle/gradle-node-plugin/releases
+gradleNodePlugin = "6.0.0"               # https://github.com/node-gradle/gradle-node-plugin/releases
 gitVersioningPlugin = "6.4.2"            # https://github.com/qoomon/gradle-git-versioning-plugin/releases
 
 [libraries]