Bump org.testcontainers:testcontainers in /benchmark-overhead

Bumps [org.testcontainers:testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.17.6 to 1.18.0.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.18.0)

---
updated-dependencies:
- dependency-name: org.testcontainers:testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

benchmark-overhead/build.gradle.kts

@@ -18,8 +18,8 @@ repositories {
 dependencies {
   implementation(enforcedPlatform("org.junit:junit-bom:5.9.2"))
 
-  testImplementation("org.testcontainers:testcontainers:1.17.6")
-  testImplementation("org.testcontainers:postgresql:1.17.6")
+  testImplementation("org.testcontainers:testcontainers:1.18.0")
+  testImplementation("org.testcontainers:postgresql:1.18.0")
   testImplementation("org.junit.jupiter:junit-jupiter-api")
   testImplementation("org.junit.jupiter:junit-jupiter-params")
   testImplementation("com.squareup.okhttp3:okhttp:4.10.0")