editoast: bump thiserror from 2.0.3 to 2.0.6 in /editoast

Bumps [thiserror](/~https://github.com/dtolnay/thiserror) from 2.0.3 to 2.0.6.
- [Release notes](/~https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@2.0.3...2.0.6)

---
updated-dependencies:
- dependency-name: thiserror
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

editoast/Cargo.toml

@@ -71,7 +71,7 @@ serde = { version = "1.0.215", features = ["derive"] }
 serde_json = "1.0.133"
 strum = { version = "0.26.3", features = ["derive"] }
 tempfile = "3.14.0"
-thiserror = "2.0.3"
+thiserror = "2.0.6"
 tokio = { version = "1.41.1", features = ["fs", "macros", "rt-multi-thread"] }
 tokio-postgres = "0.7.12"
 tracing = { version = "0.1.41", default-features = false, features = [