Bump com.netflix.nebula:nebula-release-plugin from 18.0.4 to 18.0.8 (#4460)

Bumps [com.netflix.nebula:nebula-release-plugin](https://github.com/nebula-plugins/nebula-release-plugin) from 18.0.4 to 18.0.8.
- [Release notes](https://github.com/nebula-plugins/nebula-release-plugin/releases)
- [Changelog](https://github.com/nebula-plugins/nebula-release-plugin/blob/main/CHANGELOG.md)
- [Commits](nebula-plugins/nebula-release-plugin@v18.0.4...v18.0.8)

---
updated-dependencies:
- dependency-name: com.netflix.nebula:nebula-release-plugin
  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>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -178,7 +178,7 @@ wiremockJunit5 = { module = "ru.lanwen.wiremock:wiremock-junit5", version.ref =
 
 # plugin dependencies
 plugin-license = { module = "gradle.plugin.com.hierynomus.gradle.plugins:license-gradle-plugin", version = "0.16.1" }
-plugin-nebulaRelease = { module = "com.netflix.nebula:nebula-release-plugin", version = "18.0.4" }
+plugin-nebulaRelease = { module = "com.netflix.nebula:nebula-release-plugin", version = "18.0.8" }
 plugin-nebulaPublishing = { module = "com.netflix.nebula:nebula-publishing-plugin", version = "20.3.0" }
 plugin-nebulaProject = { module = "com.netflix.nebula:nebula-project-plugin", version = "10.1.5" }
 plugin-nebulaInfo = { module = "com.netflix.nebula:gradle-info-plugin", version = "12.1.6" }