Update plugin com.github.johnrengelman.shadow to v8

Author: renovate[bot]

build.gradle.kts

@@ -4,7 +4,7 @@ plugins {
     // Kotlinx serialization for any data format
     kotlin("plugin.serialization") version "1.7.22"
     // Shade the plugin
-    id("com.github.johnrengelman.shadow") version "7.1.2"
+    id("com.github.johnrengelman.shadow") version "8.1.1"
     // Allow publishing
     `maven-publish`