Update kotlin monorepo to v1.9.20

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-kotlin = "1.9.10"
+kotlin = "1.9.20"
 kotlinCoroutines = "1.7.3"
 dependencyUpdates = "0.48.0"
 

src/main/kotlin/github-action-orchestrator.main.kts

@@ -1,8 +1,8 @@
 #!/usr/bin/env kotlin
 
-@file:DependsOn("org.jetbrains.kotlin:kotlin-script-runtime:1.9.10")
-@file:DependsOn("org.jetbrains.kotlin:kotlin-main-kts:1.9.10")
-@file:DependsOn("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.9.10")
+@file:DependsOn("org.jetbrains.kotlin:kotlin-script-runtime:1.9.20")
+@file:DependsOn("org.jetbrains.kotlin:kotlin-main-kts:1.9.20")
+@file:DependsOn("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.9.20")
 @file:DependsOn("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3")
 @file:DependsOn("eu.jrie.jetbrains:kotlin-shell-core:0.2.1")
 @file:DependsOn("io.ktor:ktor-client-core-jvm:2.3.4")