Bump syn from 2.0.75 to 2.0.76 in /lang/rust (#3121)

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.75 to 2.0.76.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.75...2.0.76)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

lang/rust/avro_derive/Cargo.toml

@@ -37,7 +37,7 @@ darling = { default-features = false, version = "0.20.10" }
 proc-macro2 = { default-features = false, version = "1.0.86" }
 quote = { default-features = false, version = "1.0.37" }
 serde_json = { workspace = true }
-syn = { default-features = false, version = "2.0.75", features = ["full", "fold"] }
+syn = { default-features = false, version = "2.0.76", features = ["full", "fold"] }
 
 [dev-dependencies]
 apache-avro = { default-features = false, path = "../avro", features = ["derive"] }