Update start_windows.bat

backend/start_windows.bat

@@ -1,5 +1,4 @@
-REM This method is not recommended, and we recommend you use the `start.sh` file with WSL instead.
-
+:: This method is not recommended, and we recommend you use the `start.sh` file with WSL instead.
 @echo off
 SETLOCAL ENABLEDELAYEDEXPANSION