Update thiserror from 1.0.69 to 2.0.3

Summary:
Release notes:

- https://github.com/dtolnay/thiserror/releases/tag/2.0.0
- https://github.com/dtolnay/thiserror/releases/tag/2.0.1
- https://github.com/dtolnay/thiserror/releases/tag/2.0.2
- https://github.com/dtolnay/thiserror/releases/tag/2.0.3

Reviewed By: zertosh

Differential Revision: D66562325

fbshipit-source-id: 9b4b0dd517c180b1856ce0dc9be3eb84d686c2b7

fb303/thrift/Cargo.toml

@@ -24,7 +24,7 @@ once_cell = "1.12"
 ref-cast = "1.0.18"
 serde = { version = "1.0.185", features = ["derive", "rc"] }
 serde_derive = "1.0.185"
-thiserror = "1.0.64"
+thiserror = "2"
 
 [build-dependencies]
 thrift_compiler = { version = "0.1.0", git = "https://github.com/facebookexperimental/rust-shed.git", branch = "main" }