fix: dont use by since it uses the name

jfmod/src/main/kotlin/jfmod.module.gradle.kts

@@ -10,10 +10,10 @@ plugins {
 }
 
 val args = extensions.create<JfModuleExtension>("jfModule")
-val lomArgs: LomExtension by extensions
+val lomArgs get() = extensions.getByName<LomExtension>("lom")
 
 val isRoot = project == rootProject
-val rootArgs: JfModExtension by rootProject.extensions
+val rootArgs get() = rootProject.extensions.getByName<JfModExtension>("jfMod")
 
 insertEarlyAfterEvaluate {
     args.check(project)