Dock: Tooltip is not updated

### Microsoft PowerToys version

0.98

### Installation method

Dev build in Visual Studio

### Area(s) with issue?

Command Palette

### Steps to reproduce

It looks like Dock item tooltips are not being updated when the underlying list item changes.

After executing this the tooltip shows the old title:

```csharp
private NoOpCommand _noOpCommand = new();

...

this.Title = "";
this.Subtitle = "";
this.Icon = Icons.NoMedia;
this.Command = this._noOpCommand;
this.MoreCommands = [];
```

### ✔️ Expected Behavior

_No response_

### ❌ Actual Behavior

_No response_

### Upload Bug Report ZIP-file

_No response_

### Additional Information

_No response_

### Other Software

_No response_