BUG: Flow Launcher got an error while trying to update plugins.

### Checks

- [x] I have checked that this issue has not already been reported.

- [x] I am using the latest version of Flow Launcher.

- [ ] I am using the prerelease version of Flow Launcher.

### Problem Description

I was trying to update plugins installed (using the `plugin manager` add-ons, via `pm update` command), but got this problem several times.

### To Reproduce

1. Install `Plugin Manager` addons.
2. Run (after having installed a numerous number of plugins) the addons via `pm update` command.
3. See the issue (does not happen all the time, but quite often).

### Screenshots

_No response_

### Flow Launcher Version

1.20.2

### Windows Build Number

10.0.22631.5624

### Error Log

## As shown in the instruction
Please open new issue in https://github.com/Flow-Launcher/Flow.Launcher/issues
1. Upload log file: C:\Users\[user]\AppData\Roaming\FlowLauncher\Logs\1.20.2\2025-07-25.txt
2. Copy below exception message

## File

[2025-07-25.txt](https://github.com/user-attachments/files/21426005/2025-07-25.txt)

## Exception message

```shell

Flow Launcher version: 1.20.2
OS Version: 22631.5624
IntPtr Length: 8
x64: True

Python Path: C:\Users\[user]\AppData\Roaming\FlowLauncher\Environments\Python\PythonEmbeddable-v3.11.4\pythonw.exe
Node Path: C:\Users\[user]\AppData\Roaming\FlowLauncher\Environments\Node.js\Node-v16.18.0\node-v16.18.0-win-x64\node.exe

Date: 07/25/2025 08:41:57
Exception:
System.Net.WebException: The remote server returned an error: (666) .
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at MS.Internal.WpfWebRequestHelper.EndGetResponse(WebRequest request, IAsyncResult ar)
at System.Windows.Navigation.NavigationService.HandleWebResponse(IAsyncResult ar)
at System.Windows.Navigation.NavigationService.<>c__DisplayClass102_0.b__0(Object unused)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

```