Update app.py

app.py

@@ -51,7 +51,7 @@ password=os.environ.get("MONGODB")
 def init_database():
     uri = f"mongodb+srv://new-user:{password}@cluster0.xb2urf6.mongodb.net/?retryWrites=true&w=majority&appName=Cluster0"
     client = MongoClient(uri)
-    db = client["elo_ratings2"]
+    db = client["elo_ratings3"]
     collection = db["elo_ratings"]
     return collection