Fix repeat syntax error

app.py

@@ -146,7 +146,7 @@ def random_seed():
 
 # make markdown text for available models...
 markdown_model_tags = [f"<{model}>" for model in model_tags if model != "ahx-model-1" and model != "ahx-model-2"]
-markdown_model_text = "\n".join([markdown_model_tags)
+markdown_model_text = "\n".join(markdown_model_tags)
 
 # make markdown text for available betas...
 markdown_betas_tags = [f"<{model}>" for model in model_tags if "beta" in model]