chore(core-deps): update dependency org.jetbrains.kotlin:kotlin-stdlib to v1.8.20

Author: renovate[bot]

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ confluent = "7.3.1"
 kafka = "6.2.10-ce"
 kmongo = "4.8.0"
 kotest = "5.5.5"
-kotlin = "1.8.10"
+kotlin = "1.8.20"
 ktor = "2.2.4"
 
 [libraries]