Add truncate to task model (huggingface#1090)

Author: nsarrazin

.env.template

@@ -231,6 +231,7 @@ MODELS=`[
       "parameters": {
         "temperature": 0.1,
         "stop": ["<|eot_id|>"],
+        "truncate": 1024,
       },
       "unlisted": true
     }