Update plugin com.gradleup.shadow to v9.1.0

Author: renovate[bot]

build.gradle

@@ -1,6 +1,6 @@
 plugins {
   // https://plugins.gradle.org/plugin/com.gradleup.shadow
-  id 'com.gradleup.shadow' version '9.0.2'
+  id 'com.gradleup.shadow' version '9.1.0'
   // https://plugins.gradle.org/plugin/de.undercouch.download
   id 'de.undercouch.download' version '5.6.0'
   id 'java'