Restart service after upgrading

### Is there an existing issue for this?

- [X] I have searched the existing issues

### OS/Web Information

- Web Browser: Chrome 98
- Local OS: Chrome OS 98
- Remote OS: Debian; Kernel 4.15.15
- Remote Architecture: amd64
- `code-server --version`: 4.1.0

### Steps to Reproduce

1. Install vscode 3.12.0. Verify that it launches.
2. Install vscode 4.0.1 or 4.1.0 and attempt to launch.

(This is using the default installation script.)

### Expected

Upgraded vscode launches.

### Actual

The webpage shows: `ENOENT: no such file or directory, open '/usr/lib/code-server/src/browser/pages/vscode.html'`

### Logs

_No response_

### Screenshot/Video

_No response_

### Does this issue happen in VS Code?

- [X] I cannot reproduce this in VS Code.

### Are you accessing code-server over HTTPS?

- [X] I am using HTTPS.

### Notes

Downgrading back to 3.12.0 resolves the issue.