Update app.py

app.py

@@ -23,7 +23,7 @@ st.set_page_config(
     layout="wide")
 
 # for custom CSS styling
-with open(".\src\style.css") as f:
+with open("./src/style.css") as f:
     st.markdown(f"<style>{f.read()}</style>", unsafe_allow_html=True)
 
 # application header