Bump io.github.goooler.shadow in the dependencies group

Bumps the dependencies group with 1 update: [io.github.goooler.shadow](https://github.com/Goooler/shadow).


Updates `io.github.goooler.shadow` from 8.1.7 to 8.1.8
- [Release notes](https://github.com/Goooler/shadow/releases)
- [Commits](Goooler/shadow@v8.1.7...v8.1.8)

---
updated-dependencies:
- dependency-name: io.github.goooler.shadow
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
     java
-    id("io.github.goooler.shadow") version "8.1.7"
+    id("io.github.goooler.shadow") version "8.1.8"
 }
 
 group = "com.github.rfresh2"