Update kotlin monorepo to v1.9.20 - autoclosed

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlin.plugin.serialization (source)	1.9.10 -> 1.9.20
org.jetbrains.kotlin.jvm (source)	1.9.10 -> 1.9.20
org.jetbrains.kotlin:kotlin-gradle-plugin (source)	1.9.10 -> 1.9.20

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[what-the-diff]

PR Summary

• Updated Kotlin Version
  The version of Kotlin, the programming language we use for building our software, has been updated from 1.9.10 to 1.9.20. This could result in enhanced performance, efficiency, and may additionally provide new tools and features for our developers to work with.