Update llms.txt: improve date/time format in API documentation examples

- Change date format from ISO (2025-11-25) to readable (Nov 25, 2025)
- Change time format from 24h (09:30-10:00) to 12h (9:30 AM - 10:00 AM)
- Makes example responses more user-friendly in LLM documentation [skip-cd]

Author: ThomasHoussin

data/llms.txt

@@ -164,8 +164,8 @@ https://adoptai.codecrafter.fr/sessions?date=2025-11-25&search=finance
       "id": "...",
       "title": "...",
       "description": "...",
-      "date": "2025-11-25",
-      "time": "09:30-10:00",
+      "date": "Nov 25, 2025",
+      "time": "9:30 AM - 10:00 AM",
       "stage": "CEO Stage",
       "speakers": [
         {