Remove unnecessary OpenAI API key typo fallback

- Revert to standard OPENAI_API_KEY environment variable
- The typo was only in chat message, not in actual Hugging Face configuration
- Clean up code to use proper environment variable name

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

pages/relatorio_ia.py

@@ -49,8 +49,7 @@ def setup_openai():
         pass
     
     # Priorizar variáveis de ambiente do sistema (Hugging Face Spaces)
-    # Tentar ambas as grafias (pode haver erro de digitação no secret)
-    api_key = os.getenv('OPENAI_API_KEY') or os.getenv('OPEANAI_APY_KEY')
+    api_key = os.getenv('OPENAI_API_KEY')
     
     if not api_key:
         return False