Update dependency androidx.test.ext:truth to v1.6.0

Author: renovate[bot]

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

@@ -43,7 +43,7 @@ object Versions {
     const val runner = "1.6.2"
     const val rules = "1.5.0"
     const val junit = "1.1.5"
-    const val truth_ext = "1.5.0"
+    const val truth_ext = "1.6.0"
     const val espresso_core = "3.5.1"
     const val mockK = "1.13.13"
     const val arch_core = "2.2.0"