Update backend/main.py

backend/main.py

@@ -14,7 +14,7 @@ from backend.ref import refRecommend
 from backend.spellchecker import check
 from backend.auth.routes import router as auth_router
 from backend.auth.routes import get_current_user
-from post_router import router as post_router
+from backend.post_router import router as post_router
 import os
 import requests