build: Update JUnit from 1.11.4 to 1.12.1

Author: thorlauridsen

gradle/local.versions.toml

@@ -2,7 +2,7 @@
 coroutines = "1.10.2"
 h2database = "2.3.232"
 jackson = "2.19.0"
-junitPlatformLauncher = "1.11.4"
+junitPlatformLauncher = "1.21.1"
 kotlin = "2.1.21"
 liquibase = "4.32.0"
 postgres = "42.7.5"