app.py: list only CPU models from model repo

app.py

@@ -41,7 +41,7 @@ def main():
         with gr.Row():
             with gr.Column(variant="panel"):
                 repo_files = list_repo_files(repo_id="balacoon/tts")
-                model_files = [x for x in repo_files if x.endswith(".addon")]
+                model_files = [x for x in repo_files if x.endswith("_cpu.addon")]
                 model_name = gr.Dropdown(
                     label="Model",
                     choices=model_files,