Update gradle shadow plugin to gradleup shadow plugin.

build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     `java`
     `maven-publish`
-    id("com.github.johnrengelman.shadow") version "8.1.1"
+    id("com.gradleup.shadow") version "9.0.0-beta4"
 }
 
 allprojects {