Update plugin com.gradleup.shadow to v9.1.0

Author: renovate[bot]

build.gradle.kts

@@ -8,7 +8,7 @@ import java.nio.file.Files
 plugins {
     java
     `maven-publish`
-    id("com.gradleup.shadow") version "9.0.2"
+    id("com.gradleup.shadow") version "9.1.0"
     id("xyz.jpenilla.run-paper") version "2.3.1"
     id("net.minecrell.plugin-yml.bukkit") version "0.6.0"
     id("io.papermc.paperweight.userdev") version "2.0.0-beta.18"