Bump org.apache.groovy:groovy from 4.0.13 to 4.0.15

Bumps [org.apache.groovy:groovy](https://github.com/apache/groovy) from 4.0.13 to 4.0.15.
- [Commits](https://github.com/apache/groovy/commits)

---
updated-dependencies:
- dependency-name: org.apache.groovy:groovy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

gradle/libs.versions.toml

@@ -38,7 +38,7 @@ gradle-bnd = { module = "biz.aQute.bnd:biz.aQute.bnd.gradle", version.ref = "bnd
 gradle-shadow = { module = "com.github.johnrengelman:shadow", version = "8.1.1" }
 gradle-spotless = { module = "com.diffplug.spotless:spotless-plugin-gradle", version = "6.21.0" }
 gradle-versions = { module = "com.github.ben-manes:gradle-versions-plugin", version.ref = "gradleVersionsPlugin" }
-groovy4 = { module = "org.apache.groovy:groovy", version = "4.0.13" }
+groovy4 = { module = "org.apache.groovy:groovy", version = "4.0.15" }
 groovy2-bom = { module = "org.codehaus.groovy:groovy-bom", version = "2.5.21" }
 hamcrest = { module = "org.hamcrest:hamcrest", version = "2.2" }
 jfrunit = { module = "org.moditect.jfrunit:jfrunit-core", version = "1.0.0.Alpha2" }