build(deps): bump syn from 1.0.109 to 2.0.65

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.109 to 2.0.65.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@1.0.109...2.0.65)

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

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

precompiles/macro/Cargo.toml

@@ -19,7 +19,7 @@ prettyplease = "0.2.20"
 proc-macro2 = "1.0"
 quote = "1.0"
 sp-crypto-hashing = { workspace = true }
-syn = { version = "1.0", features = ["extra-traits", "fold", "full", "visit"] }
+syn = { version = "2.0", features = ["extra-traits", "fold", "full", "visit"] }
 
 [dev-dependencies]
 macrotest = "1.0.12"