Bump kotlin from 2.1.10 to 2.1.20 (#32)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.1.10"
+kotlin = "2.1.20"
 kotest = "6.0.0.M2"
 serialization = "1.8.0"
 graphql = "8.4.0"