Add gemma 7B it to old models (#995)

Author: nsarrazin

.env.template

@@ -255,7 +255,8 @@ OLD_MODELS=`[
   {"name":"openchat/openchat_3.5"},
   {"name":"openchat/openchat-3.5-1210"},
   {"name": "tiiuae/falcon-180B-chat"},
-  {"name": "codellama/CodeLlama-34b-Instruct-hf"}
+  {"name": "codellama/CodeLlama-34b-Instruct-hf"},
+  {"name": "google/gemma-7b-it"}
 ]`
 
 TASK_MODEL='mistralai/Mistral-7B-Instruct-v0.1'