Bump com.gradleup.shadow from 8.3.6 to 9.1.0

Bumps [com.gradleup.shadow](https://github.com/GradleUp/shadow) from 8.3.6 to 9.1.0.
- [Release notes](https://github.com/GradleUp/shadow/releases)
- [Commits](GradleUp/shadow@8.3.6...9.1.0)

---
updated-dependencies:
- dependency-name: com.gradleup.shadow
  dependency-version: 9.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ testcontainers = "1.21.0"
 vertx = "4.5.14"
 
 plugin-jib = "3.4.5"
-plugin-shadow = "8.3.6"
+plugin-shadow = "9.1.0"
 
 [libraries]
 commons-io = { module = "commons-io:commons-io", version.ref = "commons-io" }