chore(deps): Update dependency io.github.goooler.shadow:shadow-gradle-plugin to v8.1.8

Author: renovate[bot]

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ run-task = "2.3.0"
 mod-publish-plugin = "0.5.2"
 hangarPublishPlugin = "0.1.2"
 indra = "3.1.3"
-shadow = "8.1.7"
+shadow = "8.1.8"
 adventure = "4.17.0"
 adventurePlatform = "4.3.3"
 adventurePlatformFabric = "5.14.0"