chore: bump junitPlatform from 6.1.0 to 6.1.1

Bumps `org.junit.platform:junit-platform-launcher` from 6.1.0 to 6.1.1.

Patch release — backwards compatible.

gradle/libs.versions.toml

@@ -11,7 +11,7 @@ androidxTestEspresso = "3.7.0"
 coroutines = "1.11.0"
 junit = "4.13.2"
 junit5 = "6.1.0"
-junitPlatform = "6.1.0"
+junitPlatform = "6.1.1"
 kotlin = "2.4.0"
 # standalone per KSP 2.0+ guidance — NOT kotlinVersion-kspVersion; easy
 # to miss during Kotlin upgrades since it no longer tracks the Kotlin version.