fix(deps): update dependency org.springframework.boot:spring-boot-starter-test to v2.7.18 (#269)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs-test.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 kotlinx = "1.7.3"
-spring-boot = "2.7.17"
+spring-boot = "2.7.18"
 spring-kafka = "2.9.13"
 junit = "5.10.1"
 kotest = "5.8.0"