Always download Kotlin 2.1.0-Beta1

Change-Id: I705ff90fbca66d7eb2a30ee201145385016196dc

d8_r8/commonBuildSrc/src/main/kotlin/DependenciesPlugin.kt

diff --git a/d8_r8/commonBuildSrc/src/main/kotlin/DependenciesPlugin.kt b/d8_r8/commonBuildSrc/src/main/kotlin/DependenciesPlugin.kt
index d8c3eff..ecffa3a 100644
--- a/d8_r8/commonBuildSrc/src/main/kotlin/DependenciesPlugin.kt
+++ b/d8_r8/commonBuildSrc/src/main/kotlin/DependenciesPlugin.kt
@@ -894,6 +894,7 @@
     "kotlin-compiler-1.8.0",
     "kotlin-compiler-1.9.21",
     "kotlin-compiler-2.0.20",
+    "kotlin-compiler-2.1.0-Beta1",
     "kotlin-compiler-dev")
     .map { ThirdPartyDependency(
       it,