Update dependency androidx.test.ext:junit to v1.2.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ androidx-constraintlayout = "2.1.4"
 androidx-core-ktx = "1.13.1"
 androidx-espresso-core = "3.6.1"
 androidx-material = "1.12.0"
-androidx-test-junit = "1.2.0"
+androidx-test-junit = "1.2.1"
 compose = "1.6.8"
 compose-plugin = "1.6.11"
 junit = "4.13.2"