Add page_3 to navigation in main_page.py

Author: aak2257

main_page.py

@@ -5,8 +5,9 @@
 page_2 = st.Page("region.py", title="EIA Region Demand")
 page_3 = st.Page("proposal.py", title="Project Proposal, Feedback, and Reflections")
 # Set up navigation
-pg = st.navigation([main_page, page_2])
+pg = st.navigation([main_page, page_2, page_3])
 
 # Run the selected page
 pg.run()
 
+