Update kotest to v5.8.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -53,7 +53,7 @@ johnrengelman-shadow = "8.1.1"
 kaml = "0.57.0"
 kct = "1.5.0"
 knit = "0.5.0"
-kotest = "5.8.0"
+kotest = "5.8.1"
 kotlinx-atomicfu = "0.16.3"
 kotlinx-binaryCompatibility = "0.14.0"
 kotlinx-cli = "0.3.6"