Update chain_app.py

chain_app.py

@@ -10,7 +10,7 @@ import cohere
 hf_token = os.environ.get("HF_TOKEN")
 openai_api_key = os.environ.get('OPENAI_API_KEY')
 groq_api_key = os.environ.get('GROQ_API_KEY')
-cohere_api_key = os.enviorn.get('COHERE_API_KEY')
+cohere_api_key = os.environ.get('COHERE_API_KEY')
 
 hf_text_client = Client("Artin2009/text-generation", hf_token=hf_token)
 # hf_image_client = Client('Artin2009/image-generation')