Update thiserror requirement from 1.0 to 2.0

Updates the requirements on [thiserror](https://github.com/dtolnay/thiserror) to permit the latest version.
- [Release notes](https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@1.0.0...2.0.3)

---
updated-dependencies:
- dependency-name: thiserror
  dependency-type: direct:production
...

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

notion-sdk/Cargo.toml

@@ -18,4 +18,4 @@ reqwest = { version = "0.12.2", features = ["json"] }
 uuid = { version = "1.3.0", features = ["serde"] }
 chrono = { version = "0.4.23", default-features = false, features = ["serde", "clock"] }
 emojis = "0.6.0"
-thiserror = "1.0"
+thiserror = "2.0"