Update app.py

Modify a typo regarding the model description of ```single_conversation_relative``` (in line 44)

app.py

@@ -41,12 +41,12 @@ model_info = {
     },
     "single_conversation_relative": {
         'url': 'https://huggingface.co/HannahLin271/NanoGPT/resolve/main/singleConversation_Relative.pt',
-        'description': "Trained on entire conversations from the Facebook Emotion Dialogues dataset, excluding tags other than <bot> and <human>,, using a default batch size of 64, using relative positional embedding.",
+        'description': "Trained on Facebook Emotion Dialogues dataset, excluding emotion annotations for simpler conversations, using a default batch size of 64, using relative positional embedding.",
         'logo': '🧋'
     },
     "whole_conversation": {
         'url': 'https://huggingface.co/HannahLin271/NanoGPT/resolve/main/wholeConversation.pt',
-        'description': "Trained on entire conversations from the Facebook Emotion Dialogues dataset, excluding tags other than <bot> and <human>,, using a default batch size of 64",
+        'description': "Trained on entire conversations from the Facebook Emotion Dialogues dataset, excluding tags other than <bot> and <human>, using a default batch size of 64",
         'logo': '🍵'
     },
 }