Add types

Signed-off-by: smajumdar <titu1994@gmail.com>

app.py

@@ -477,7 +477,7 @@ def _return_yt_html_embed(yt_url):
     return HTML_str
 
 
-def yt_transcribe(yt_url, model_name):
+def yt_transcribe(yt_url: str, model_name: str):
     """ Modified from https://huggingface.co/spaces/whisper-event/whisper-demo """
     if yt_url == "":
         text = ""