error message for 32 bit arch (#562)

gradle-plugins/compose/src/main/kotlin/org/jetbrains/compose/desktop/application/internal/osUtils.kt

@@ -36,7 +36,7 @@ internal val currentArch by lazy {
     when (osArch) {
         "x86_64", "amd64" -> Arch.X64
         "aarch64" -> Arch.Arm64
-        else -> error("Unknown OS arch: $osArch")
+        else -> error("Unsupported OS arch: $osArch")
     }
 }