chore(deps): update plugin com.github.johnrengelman.shadow to v8

Author: renovate[bot]

settings.gradle

@@ -38,7 +38,7 @@ dependencyResolutionManagement {
             plugin ('spotless', 'com.diffplug.spotless').version('7.0.2')
             plugin ('versioning', 'net.nemerosa.versioning').version('2.15.1')
             plugin ('ospackage', 'com.netflix.nebula.ospackage').version('11.11.1')
-            plugin ('shadow', 'com.github.johnrengelman.shadow').version('7.1.2')
+            plugin ('shadow', 'com.github.johnrengelman.shadow').version('8.1.1')
             plugin ('sdkman-vendors', 'io.sdkman.vendors').version('3.0.0')
             plugin ('foojay-resolver', 'org.gradle.toolchains.foojay-resolver-convention').version('0.9.0')