chore(deps): update kotest to v6.0.5

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 alchemist = "42.3.18"
-kotest = "6.0.4"
+kotest = "6.0.5"
 
 [libraries]
 alchemist = { module = "it.unibo.alchemist:alchemist", version.ref = "alchemist" }