chore(deps): bump souvlaki from 0.7.3 to 0.8.3 in /src-tauri

Bumps [souvlaki](https://github.com/Sinono3/souvlaki) from 0.7.3 to 0.8.3.
- [Release notes](https://github.com/Sinono3/souvlaki/releases)
- [Changelog](https://github.com/Sinono3/souvlaki/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Sinono3/souvlaki/compare/0.7.3...0.8.3)

---
updated-dependencies:
- dependency-name: souvlaki
  dependency-version: 0.8.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

src-tauri/Cargo.toml

@@ -91,7 +91,7 @@ spectrum-analyzer = "1.5"
 ebur128 = "0.1"
 
 # Media controls (MPRIS on Linux)
-souvlaki = "0.7"
+souvlaki = "0.8"
 
 # Desktop notifications → ashpd in [target.linux] deps below