fix: sanitize timestamp in package.bat ldflags

package.bat

@@ -2,7 +2,9 @@
 setlocal
 
 set VERSION=1.0.0
-set LDFLAGS=-s -w -X "main.Version=%VERSION%" -X "main.BuildTime=%DATE% %TIME%"
+for /f "tokens=2 delims==" %%I in ('wmic os get localdatetime /value') do set datetime=%%I
+set BUILD_TIME=%datetime:~0,4%-%datetime:~4,2%-%datetime:~6,2% %datetime:~8,2%:%datetime:~10,2%:%datetime:~12,2%
+set LDFLAGS=-s -w -X "main.Version=%VERSION%" -X "main.BuildTime=%BUILD_TIME%"
 
 echo.
 echo  Building Server...
@@ -32,4 +34,4 @@ echo.
 echo  Server 分发: 复制 dist\server\ 整个文件夹
 echo  Client 分发: 复制 dist\client\ 整个文件夹
 echo.
-pause
+pause