Merge pull request #1142 from guardrails-ai/docs/strict-json

strict json mode doc

Author: zsimjee

docs/how_to_guides/generate_structured_data.md

@@ -130,4 +130,18 @@ response = guard(
     prompt_params={"chat_history": chat_history},
     response_format={ "type": "json_object" }
 )
+```
+
+
+### Strict JSON Mode
+For models that support strict JSON mode, 
+
+
+```py
+response = guard(
+    model="gpt-4o",
+    messages=messages,
+    prompt_params={"chat_history": chat_history},
+    response_format=g.response_format_json_schema()
+)
 ```