Remove "from:" from zulip actions

Author: uhlhosting

.github/workflows/build.yml

@@ -117,7 +117,6 @@ jobs:
         api-key: ${{ secrets.ZULIP_API_KEY }}   # Zulip API key
         organization-url: 'https://chat.uhlhosting.ch' # Your Zulip organization URL
         to: 'Reports'
-        from: 'Github'
         type: 'stream'
         topic: 'GitHub Actions'
         content: 'Build completed for PHP ${{ matrix.php_version }}. Check the [releases page](https://github.com/uhlhosting/Unit-PHP/releases) for the package.'