Update plugin com.gradle.plugin-publish to v2.1.1

Author: renovate[bot]

build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     `kotlin-dsl`
     `java-gradle-plugin`
-    id("com.gradle.plugin-publish") version "2.1.0"
+    id("com.gradle.plugin-publish") version "2.1.1"
     id("net.kyori.indra") version "4.0.0"
     id("net.kyori.indra.publishing") version "4.0.0"
     signing