Upgrade to v0.51.0

[OniriCorpe]

https://github.com/navidrome/navidrome/releases/tag/v0.51.0

Problem

• Description of why you made this PR

Solution

• And how do you fix that problem

PR Status

• [ ] Code finished and ready to be reviewed/tested
• [ ] The fix/enhancement were manually tested (if applicable)

Automatic tests

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[yunohost-bot]

May the CI gods be with you!