Update kotlin monorepo to v2.3.20

Author: renovate[bot]

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ junitPlatformVersionRange = "[1.12,7)"
 asm = '9.9.1'
 mockito4 = '4.11.0'
 mockito5 = '5.23.0'
-workflows-kotlin = "2.3.10"
+workflows-kotlin = "2.3.20"
 
 [libraries]
 jetbrains-annotations = "org.jetbrains:annotations:26.1.0"