build(deps): bump io.github.java-diff-utils:java-diff-utils

Bumps [io.github.java-diff-utils:java-diff-utils](https://github.com/java-diff-utils/java-diff-utils) from 4.17 to 4.18.
- [Release notes](https://github.com/java-diff-utils/java-diff-utils/releases)
- [Changelog](https://github.com/java-diff-utils/java-diff-utils/blob/master/CHANGELOG.md)
- [Commits](java-diff-utils/java-diff-utils@java-diff-utils-parent-4.17...java-diff-utils-parent-4.18)

---
updated-dependencies:
- dependency-name: io.github.java-diff-utils:java-diff-utils
  dependency-version: '4.18'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -37,7 +37,7 @@ kotest-runner = { module = "io.kotest:kotest-runner-junit5" }
 kotest-table = { module = "io.kotest:kotest-assertions-table" }
 mockk = "io.mockk:mockk:1.14.11"
 
-diff-utils = "io.github.java-diff-utils:java-diff-utils:4.17"
+diff-utils = "io.github.java-diff-utils:java-diff-utils:4.18"
 
 groovy-bom = "org.apache.groovy:groovy-bom:6.0.0"
 spock = "org.spockframework:spock-core:2.5-groovy-6.0"