docs: 更新触控支持文档

docs/About touch support.md

@@ -9,3 +9,5 @@ When enabling touch support, Magpie performs the following actions:
 2. Copies the TouchHelper.exe to `System32\Magpie`. During scaling, Magpie runs this program to enable touch support.
 
 Both of these actions constitute significant changes to the OS, thus requiring administrator privileges. If touch support is no longer needed, this option should be disabled. Magpie will then revert these changes, leaving no traces in the OS.
+
+Touch support may fail for various reasons, such as when TouchHelper.exe requires an update. In such cases, Magpie will request administrator privileges before scaling to resolve the issue.

docs/关于触控支持.md

@@ -9,3 +9,5 @@
 2. 将 TouchHelper.exe 文件复制到 `System32\Magpie` 文件夹。在缩放时，Magpie 会运行此程序以实现触控支持。
 
 这两项操作都对操作系统构成重大更改，因此需要管理员权限。如果不再需要触控支持，应关闭此选项，Magpie 会撤销这些更改，不在操作系统中留下痕迹。
+
+触控支持可能会因为某些原因失效（比如 TouchHelper.exe 需要更新时），如果发生这种情况，Magpie 会在缩放前请求管理员权限来修复它。