Bump kotlin from 2.1.20 to 2.1.21 (#290)

dependabot[bot] · web-flow · commit d7714cf82868 · 2025-05-13T19:27:05.000+02:00
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.1.20"
+kotlin = "2.1.21"
 kotest = "6.0.0.M3"
 detekt = "1.23.8"
 ktlint = "1.1.0"
