deps(core)(deps): update dirs requirement from 5 to 6 in /src/lib/mlxcel-core (#11)

Updates the requirements on [dirs](https://github.com/soc/dirs-rs) to permit the latest version.
- [Commits](https://github.com/soc/dirs-rs/commits)

---
updated-dependencies:
- dependency-name: dirs
  dependency-version: 6.0.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

src/lib/mlxcel-core/Cargo.toml

@@ -24,7 +24,7 @@ sha2 = "0.11"
 thiserror = "2.0"
 tokenizers = "0.22.2"
 bincode = "1"
-dirs = "5"
+dirs = "6"
 libm = "0.2"
 tracing = "0.1"