Bump com.gradleup.shadow from 9.0.0-beta2 to 9.0.0-beta4 in /Agent (#1)

Bumps [com.gradleup.shadow](https://github.com/GradleUp/shadow) from 9.0.0-beta2 to 9.0.0-beta4.
- [Release notes](https://github.com/GradleUp/shadow/releases)
- [Commits](GradleUp/shadow@9.0.0-beta2...9.0.0-beta4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Agent/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id("com.gradleup.shadow") version "9.0.0-beta2"
+    id("com.gradleup.shadow") version "9.0.0-beta4"
 }
 
 base {