Update plugin buildconfig to v4

gradle/libs.versions.toml

@@ -70,6 +70,6 @@ jjwt = ["jjwt-api", "jjwt-jackson"]
 kotlinx-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
 kotlinx-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 gradle-publish = { id = "com.gradle.plugin-publish", version = "1.2.0" }
-buildconfig = { id = "com.github.gmazzo.buildconfig", version = "3.1.0" }
+buildconfig = { id = "com.github.gmazzo.buildconfig", version = "4.1.1" }
 mikbot = { id = "dev.schlaubi.mikbot.gradle-plugin", version = "1.0.0" }
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }