Update kotlin monorepo to v2.3.20-Beta2

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This PR contains the following updates:

Package	Change	Age	Confidence
org.jetbrains.kotlin.jvm (source)	2.3.20-Beta1 → 2.3.20-Beta2
org.jetbrains.kotlin:kotlin-gradle-plugin (source)	2.3.20-Beta1 → 2.3.20-Beta2
org.jetbrains.kotlin:kotlin-reflect (source)	2.3.20-Beta1 → 2.3.20-Beta2
org.jetbrains.kotlin:kotlin-metadata-jvm (source)	2.3.20-Beta1 → 2.3.20-Beta2

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