Fix the GitHub workflow for building the Webview

[nicomiguelino]

Overview

• Modify the corresponding GitHub worflow file.

CI Runs

• https://github.com/Screenly/Anthias/actions/runs/10002521766/
  • I cancelled this CI run since the commands won't work as expected anymore.

[nicomiguelino]

This issue will be closed once build artifacts has been generated.
Here's the current CI run: https://github.com/Screenly/Anthias/actions/runs/10096973173