Update kotlin monorepo to v2.0.20 (#233)

Co-authored-by: renovate-baret[bot] <165508104+renovate-baret[bot]@users.noreply.github.com>

pom.xml

@@ -30,7 +30,7 @@
 		<maven.compiler.target>21</maven.compiler.target>
 
 		<kotlin.compiler.jvmTarget>21</kotlin.compiler.jvmTarget>
-		<kotlin.version>2.0.10</kotlin.version>
+		<kotlin.version>2.0.20</kotlin.version>
 		<!-- version used by Kotest -->
 		<kotlinx.coroutines.version>1.8.1</kotlinx.coroutines.version>
 		<serialization.version>1.7.1</serialization.version>