Ensures more consistent hyperparameters to Phi-3-mini-4k-instruct (#1095)

chart/env/prod.yaml

@@ -242,6 +242,7 @@ envVars:
           "chatPromptTemplate": "<s>{{preprompt}}{{#each messages}}{{#ifUser}}<|user|>\n{{content}}<|end|>\n<|assistant|>\n{{/ifUser}}{{#ifAssistant}}{{content}}<|end|>\n{{/ifAssistant}}{{/each}}",
           "parameters": {
             "stop": ["<|end|>", "<|endoftext|>", "<|assistant|>"],
+            "temperature": 0.7,
             "max_new_tokens": 1024,
             "truncate": 3071
           },