Update manage.py

Issue at _set_model_item() function
While using fairseq model dataset & model variables are not set

TTS/utils/manage.py

@@ -262,6 +262,7 @@ class ModelManager(object):
         if "fairseq" in model_name:
             model_type = "tts_models"
             lang = model_name.split("/")[1]
+            dataset, model = model_name.split("/")
             model_item = {
                 "model_type": "tts_models",
                 "license": "CC BY-NC 4.0",