close in-memory connection when using sqlite file

Author: CISC

scripts/compare-llama-bench.py

@@ -292,6 +292,7 @@ def __init__(self, data_file: str):
 
         if (connection):
             self.connected_file = True
+            self.connection.close()
             self.connection = connection
             self.cursor = cursor
             self._builds_init()