Update app.py

app.py

@@ -1,7 +1,7 @@
 import os
 from dotenv import load_dotenv
 import gradio as gr
-from langchain_core.prompts import PromptTemplate
+from langchain_core.prompts import PromptTemplate,ChatPromptTemplate
 from langchain_huggingface import HuggingFaceEndpoint
 from langchain_core.output_parsers import StrOutputParser
 
@@ -27,7 +27,7 @@ Make sure the blog post is informative, engaging, and well-structured.
 """
 
 # Create a prompt template instance
-blog_prompt_template = PromptTemplate(input_variables=["topic"], template=TEMPLATE)
+blog_prompt_template = ChatPromptTemplate.from_template(input_variables=["topic"], template=TEMPLATE)
 
 # Initialize the LLMChain with the HuggingFace model and prompt template
 blog_chain =  blog_prompt_template | model | StrOutputParser()