Bump com.gradleup.shadow from 8.3.8 to 8.3.9 in the gradle group

Bumps the gradle group with 1 update: [com.gradleup.shadow](https://github.com/GradleUp/shadow).


Updates `com.gradleup.shadow` from 8.3.8 to 8.3.9
- [Release notes](https://github.com/GradleUp/shadow/releases)
- [Commits](GradleUp/shadow@8.3.8...8.3.9)

---
updated-dependencies:
- dependency-name: com.gradleup.shadow
  dependency-version: 8.3.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -13,7 +13,7 @@ slf4j = "1.7.36"
 mockserver = "5.15.0"
 compile-testing = "0.21.0"
 json-schema = "1.12.1"
-shadow = "8.3.8"
+shadow = "8.3.9"
 api-guardian = "1.1.2"
 jreleaser = "1.19.0"
 runtime = "1.13.1"