Update zh-cn.json (gemini assists)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: LaunchLee

src/lang/zh-cn.json

@@ -314,7 +314,7 @@
 	"info-cursorInactiveStyle": "当焦点不在终端时的光标显示样式。",
 	"info-fontWeight": "渲染非粗体文本的字体粗细。",
 	"info-cursorBlink": "光标是否闪烁。",
-	"info-scrollback": "终端里的回滚量。回滚量是指当行已下滚到超出初始可视窗口时保留超出行的行数。",
+	"info-scrollback": "终端的回滚行数。回滚是指当内容滚动超出初始视口时所保留的文本行数。",
 	"info-tabStopWidth": "终端里的制表符固定位宽度。",
 	"info-letterSpacing": "字符之间的空隙像素量。",
 	"info-imageSupport": "终端里是否支持图像。",