Release v1.9.12 (#661)

 cmake_minimum_required(VERSION 3.13 FATAL_ERROR)
 project(sherpa-onnx)
 
-set(SHERPA_ONNX_VERSION "1.9.11")
+set(SHERPA_ONNX_VERSION "1.9.12")
 
 # Disable warning about
 #

@@ -83,6 +83,7 @@ def get_piper_models() -> List[TtsModel]:
         TtsModel(model_dir="vits-piper-en_GB-alan-low"),
         TtsModel(model_dir="vits-piper-en_GB-alan-medium"),
         TtsModel(model_dir="vits-piper-en_GB-alba-medium"),
+        TtsModel(model_dir="vits-piper-en_GB-aru-medium"),
         TtsModel(model_dir="vits-piper-en_GB-jenny_dioco-medium"),
         TtsModel(model_dir="vits-piper-en_GB-northern_english_male-medium"),
         TtsModel(model_dir="vits-piper-en_GB-semaine-medium"),