There's a merged pull request on the void-packages repository

vscode: remove deprecated --unity-launch flag from desktop file
https://github.com/void-linux/void-packages/pull/50762

Description:
VSCode has [deprecated the --unity-launch flag](https://github.com/microsoft/vscode/issues/202545) and its presence was breaking the "Open with Code" context menu option.

#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, x86_64-glibc

Closes #50682