Updater often blocks on app exe still in use

### Short summary

_No response_

### Affected version or release

1.0.17 (last I updated from)

### Installation context

_No response_

### What happened?

Lately, whenever an update is downloaded and I restart the app to install it (by clicking on the Restart Now button in the in-app notification), the installer ends up blocking in the middle of the installation because the app exe is still running. I have to wait a non-insignificant amount of time (say, ~30s) before I can retry and continue the installation. This has started happening consistently in the past 10 days or so.

### Steps to reproduce

_No response_

### Expected behavior

I'd expect the installer to wait until the process is closed before starting the update installation.

### Additional context

_No response_

先从 Restart Now 按钮流程和安装程序交接开始，然后在检查应用 exe 进程何时退出的同时，复现从版本 1.0.17 进行更新的过程。完成的标准是安装程序等待进程关闭，并继续安装，而不需要手动重试。

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