Bump docker/setup-buildx-action from 2.2.1 to 4.1.0 - #396

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8, actions/setup-dotnet@4d4a70f4a5b2a5a5329f13be4ac933f2c9206ac0, step-security/harden-runner@2e205a28d0e1da00c5f53b161f4067b052c61f34. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

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The target framework 'net6.0' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.

The target framework 'net6.0' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.