Bump syn from 2.0.74 to 2.0.75 in /lang/rust (#3107)

Author: dependabot[bot]

lang/rust/Cargo.lock

@@ -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 = "1.0.36" }
 serde_json = { workspace = true }
-syn = { default-features = false, version = "2.0.74", features = ["full", "fold"] }
+syn = { default-features = false, version = "2.0.75", features = ["full", "fold"] }
 
 [dev-dependencies]
 apache-avro = { default-features = false, path = "../avro", features = ["derive"] }