build(deps): Update syn requirement from 1.0.80 to 2.0.12

Updates the requirements on [syn](https://github.com/dtolnay/syn) to permit the latest version.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@1.0.80...2.0.12)

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

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

derive/Cargo.toml

@@ -12,4 +12,4 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.30"
 quote = "1.0.10"
-syn = {version = "1.0.80", features = ["full"]}
+syn = {version = "2.0.12", features = ["full"]}