chore(deps): bump com.gradleup.shadow from 9.0.0 to 9.4.0

Bumps [com.gradleup.shadow](https://github.com/GradleUp/shadow) from 9.0.0 to 9.4.0.
- [Release notes](https://github.com/GradleUp/shadow/releases)
- [Commits](GradleUp/shadow@9.0.0...9.4.0)

---
updated-dependencies:
- dependency-name: com.gradleup.shadow
  dependency-version: 9.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build.gradle

@@ -20,7 +20,7 @@ subprojects {
         jupiterVersion = '5.13.4'
         mockitoVersion = '4.11.0'
         nimbusVersion = '10.8'
-        shadowVersion = '9.0.0'
+        shadowVersion = '9.4.0'
 
         //IMPORTANT: This must be in sync with the shaded netty version in gRPC
         nettyVersion = '4.2.9.Final'