CmdPal: Update top-level item view model to reflect change of the associated command (#42806)

## Summary of the Pull Request

This PR implements a fix that ensures the top-level command's alias,
hotkey, and tags are automatically updated whenever the associated
command is modified, as the command defines the actual identity of the
item.

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## PR Checklist

- [x] Closes: #42796
- [x] Related to: #42807
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/TopLevelViewModel.cs

@@ -219,7 +219,7 @@ public sealed partial class TopLevelViewModel : ObservableObject, IListItem
         {
             PropChanged?.Invoke(this, new PropChangedEventArgs(e.PropertyName));
 
-            if (e.PropertyName == "IsInitialized")
+            if (e.PropertyName is "IsInitialized" or nameof(CommandItemViewModel.Command))
             {
                 GenerateId();