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

Author: renovate[bot]

buildSrc/src/main/kotlin/dependencies/Versions.kt

@@ -42,7 +42,7 @@ object Versions {
     const val test_core = "1.5.0"
     const val runner = "1.5.2"
     const val rules = "1.5.0"
-    const val junit = "1.1.5"
+    const val junit = "1.2.1"
     const val truth_ext = "1.5.0"
     const val espresso_core = "3.5.1"
     const val mockK = "1.13.11"