Switch to gradleup.shadow

Author: TBlueF

gradle/libs.versions.toml

@@ -10,5 +10,5 @@ junit-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref
 lombok = { module = "org.projectlombok:lombok", version = "1.18.32" }
 
 [plugins]
-shadow = { id = "io.github.goooler.shadow", version = "8.+" }
-spotless = { id = "com.diffplug.spotless", version = "6.+" }
+shadow = { id = "com.gradleup.shadow", version = "8.3.9" }
+spotless = { id = "com.diffplug.spotless", version = "6.25.0" }