Move to folder isn't updating namespace in the file

[lewiuberg]

Describe the bug
If I select a file in folder one/two/file.cs and input it to move to the new location one/file.cs the namespace line in file.cs remains unchanged, aka namespace one.two instead of namespace one.

To Reproduce
Steps to reproduce the behavior:

1. In the solution explorer, right-click file to move and select move to folder.
2. Input new destination.
3. Observe the namespace line in the file.

Expected behavior
The namespace line is changed to reflect the file's location.

Environment (please complete the following information):

• OS: macOS
• Version 13.0
• vscode version 1.75.0