Bump spring-cloud-starter-sleuth from 3.1.4 to 3.1.5

Bumps [spring-cloud-starter-sleuth](https://github.com/spring-cloud/spring-cloud-sleuth) from 3.1.4 to 3.1.5.
- [Release notes](https://github.com/spring-cloud/spring-cloud-sleuth/releases)
- [Commits](spring-cloud/spring-cloud-sleuth@v3.1.4...v3.1.5)

---
updated-dependencies:
- dependency-name: org.springframework.cloud:spring-cloud-starter-sleuth
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -3,7 +3,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 val mockkVersion = "1.13.2"
 val logstashVersion = "7.2"
 val springVersion = "2.5.5"
-val springSleuthVersion = "3.1.4"
+val springSleuthVersion = "3.1.5"
 val testContainersVersion = "1.17.5"
 val springDocVersion = "1.6.12"
 val tokenValidationVersion = "2.1.7"