chore(deps): update plugin org.jetbrains.kotlin.jvm to v1.9.20 (#2170)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| org.jetbrains.kotlin.jvm | `1.8.22` -> `1.9.20` |
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integrations/intellij/build.gradle.kts

@@ -7,7 +7,7 @@ plugins {
     // Java support
     id("java")
     // Kotlin support
-    id("org.jetbrains.kotlin.jvm") version "1.8.22"
+    id("org.jetbrains.kotlin.jvm") version "1.9.20"
     // gradle-intellij-plugin - read more: https://github.com/JetBrains/gradle-intellij-plugin
     id("org.jetbrains.intellij") version "1.16.0"
     // detekt linter - read more: https://detekt.github.io/detekt/gradle.html