chore(gradle): bump com.gradleup.shadow:shadow-gradle-plugin

Bumps [com.gradleup.shadow:shadow-gradle-plugin](https://github.com/GradleUp/shadow) from 8.3.8 to 9.4.1.
- [Release notes](https://github.com/GradleUp/shadow/releases)
- [Commits](GradleUp/shadow@8.3.8...9.4.1)

---
updated-dependencies:
- dependency-name: com.gradleup.shadow:shadow-gradle-plugin
  dependency-version: 9.4.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

buildSrc/build.gradle

@@ -49,7 +49,7 @@ dependencies {
         because('needed by plugin java-coding-conventions')
     }
 
-    implementation "com.gradleup.shadow:shadow-gradle-plugin:8.3.8"
+    implementation "com.gradleup.shadow:shadow-gradle-plugin:9.4.1"
 
     implementation('com.vanniktech.maven.publish:com.vanniktech.maven.publish.gradle.plugin:0.36.0') {
         because('needed by plugin java-publishing-conventions')