Releasing a new version of PoWA-web

Ensure there's no blocker issues and pull requests are resolved.
Bump the powa-web __VERSION__ in powa/__init__.py.
Make sure CI runs successfully.
Build and commit assets:
- Run npm ci to install packages.
- Run npm run build to build assets (JS and CSS).
Update the changelog if not already up-to-date.
Commit the changes (files in powa/static/dist, powa/__init__.py and CHANGELOG).
Create a tag either from the command line or Github web interface.
Verify that images are pushed to Docker hub (via the powa-podman repo).
Publish to pypi.

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