Update app.py

app.py

@@ -16,7 +16,7 @@ import numpy as np
 model_card = ModelCard(
     name="Demucs Stem Separator (All Stems)",
     description=(
-    "Separates a full music track into four individual audio stems- Drums, Bass, Vocals, Other-instrumental using the Demucs model. \n"
+    "Separates a full music track into four individual audio stems: Drums, Bass, Vocals, Other-instrumental using the Demucs model. Available models are -  \n"
     "htdemucs: Best overall fidelity and natural sound, "
      "mdx_extra: Balanced trade-off, faster processing with a small drop in quality, "
      "mdx_extra_q: Fastest & lightest, noticeable quality loss, ideal for quick previews. \n"