Bump syn from 2.0.68 to 2.0.69

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.68 to 2.0.69.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.68...2.0.69)

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

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

crates/gosub_webinterop/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-syn = { version = "2.0.68", features = ["full", "extra-traits"] }
+syn = { version = "2.0.69", features = ["full", "extra-traits"] }
 quote = { version = "1.0.36", features = [] }
 proc-macro2 = "1.0.86"
 serde = { version = "1.0.203", features = ["derive"] }