lang: Fix bytemuck_derive build error (solana-foundation#3610)

Author: acheroncrypto

Cargo.lock

@@ -58,3 +58,8 @@ borsh = "0.10.3"
 bytemuck = "1"
 solana-program = "2"
 thiserror = "1"
+
+# v1.9 specifies `rust-version = "1.84"`, which causes compatibility issues with Solana build
+# tools' Rust version (1.79.0 at the time of writing this comment).
+# TODO: Remove when the Solana version we use comes with Rust version >= 1.84
+bytemuck_derive = ">1.0.0, <1.9"