chore(deps): upgrade to shadow v7

Required before being able to upgrade to Gradle v8
It stops generating a module-info.class into the
shadow jar: information to keep in mind if an
undetermined issue occurs.

Author: AntoineJT

build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id 'java'
     id 'application'
-    id 'com.github.johnrengelman.shadow' version '6.1.0'
+    id 'com.github.johnrengelman.shadow' version '7.1.2'
     id 'io.freefair.lombok' version '6.5.1'
     id 'com.diffplug.spotless' version '7.2.1'
 }