Update Kotlin

[dorian-krefft-dt]

This PR contains the following updates:

Package	Change	Age	Confidence
org.jetbrains.kotlinx.kover	0.9.1 → 0.9.4
org.jetbrains.kotlin.jvm	2.1.20 → 2.3.0

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Pull request overview

This PR updates Kotlin-related dependencies to their latest versions, specifically upgrading the Kotlin JVM plugin from 2.1.20 to 2.3.0 and the Kover code coverage plugin from 0.9.1 to 0.9.4.

Changes:

• Updated Kotlin JVM plugin to version 2.3.0
• Updated Kover code coverage plugin to version 0.9.4

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