deps: bump the cargo-patch group in /backend with 3 updates

Bumps the cargo-patch group in /backend with 3 updates: [sqlx](https://github.com/launchbadge/sqlx), [idna_adapter](https://github.com/hsivonen/idna_adapter) and [home](https://github.com/rust-lang/cargo).


Updates `sqlx` from 0.8.1 to 0.8.6
- [Changelog](https://github.com/launchbadge/sqlx/blob/main/CHANGELOG.md)
- [Commits](launchbadge/sqlx@v0.8.1...v0.8.6)

Updates `idna_adapter` from 1.2.0 to 1.2.1
- [Commits](hsivonen/idna_adapter@v1.2.0...v1.2.1)

Updates `home` from 0.5.11 to 0.5.12
- [Changelog](https://github.com/rust-lang/cargo/blob/master/CHANGELOG.md)
- [Commits](rust-lang/cargo@home-0.5.11...home-0.5.12)

---
updated-dependencies:
- dependency-name: sqlx
  dependency-version: 0.8.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: cargo-patch
- dependency-name: idna_adapter
  dependency-version: 1.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: cargo-patch
- dependency-name: home
  dependency-version: 0.5.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: cargo-patch
...

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Author: dependabot[bot]