replace streamlit experimental functions

app.py

@@ -29,7 +29,7 @@ st.markdown(f"#### Have a conversation with {BOOK_NAME} by {AUTHOR_NAME} 🙊")
 
 
 ##### functionss ####
-@st.experimental_singleton(show_spinner=False)
+@st.cache_resource(show_spinner=False)
 def load_vectorstore():
     # download from hugging face
     cache_dir=f"{BOOK_NAME}_cache"
@@ -62,7 +62,7 @@ def load_vectorstore():
     return docsearch
 
 
-@st.experimental_memo(show_spinner=False)
+@st.cache_data(show_spinner=False)
 def load_prompt(book_name, author_name):
     prompt_template = f"""You're an AI version of {AUTHOR_NAME}'s book '{BOOK_NAME}' and are supposed to answer quesions people have for the book. Thanks to advancements in AI people can now talk directly to books.
     People have a lot of questions after reading {BOOK_NAME}, you are here to answer them as you think the author {AUTHOR_NAME} would, using context from the book.
@@ -83,7 +83,7 @@ def load_prompt(book_name, author_name):
     return PROMPT
 
     
-@st.experimental_singleton(show_spinner=False)
+@st.cache_resource(show_spinner=False)
 def load_chain():
     llm = OpenAI(temperature=0.2)