Modify Debian sources list for trixie updates (as 4.1.0-1 config)

[maiux]

Updated Debian sources list to include non-free-firmware components and removed redundant entries (as 4.1.0-1 configuration)

✍️ Description

Debian source correction as is does not include non-firmware-free

🔗 Related Issue

Fixes #

✅ Prerequisites (X in brackets)

• Self-review completed – Code follows project standards.
• Tested thoroughly – Changes work as expected.
• No security risks – No hardcoded secrets, unnecessary privilege escalations, or permission issues.

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🛠️ Type of Change (X in brackets)

• 🐞 Bug fix – Resolves an issue without breaking functionality.
• ✨ New feature – Adds new, non-breaking functionality.
• 💥 Breaking change – Alters existing functionality in a way that may require updates.
• 🆕 New script – A fully functional and tested script or script set.
• 🌍 Website update – Changes to website-related JSON files or metadata.
• [x ] 🔧 Refactoring / Code Cleanup – Improves readability or maintainability without changing functionality.
• 📝 Documentation update – Changes to README, AppName.md, CONTRIBUTING.md, or other docs.

[MickLesk]

Why as default the non free firmware?

[maiux]

In latest Proxmox Backup Server installation is present as default the "non-free-firmware"