fix(comment): review suggestion

Co-authored-by: Stefano Garzarella <sgarzare@redhat.com>

Author: priyasiddharth

virtio-queue/Cargo.toml

@@ -34,7 +34,10 @@ vm-memory = { workspace = true, features = ["backend-mmap", "backend-bitmap", "b
 name = "main"
 harness = false
 
-# Needed for kani
-# See https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
+# From https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
+#
+# Starting with Rust 1.80 (or nightly-2024-05-05), every reachable #[cfg] will be automatically
+# checked that they match the expected config names and values. To avoid warnings on
+# cfg(kani), we recommend adding the check-cfg lint config in your crate's Cargo.toml
 [lints.rust]
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(kani)'] }